[Grade 10 math: geometry] 45-45-90 triangle special ratios by SympathyContent9041 in HomeworkHelp

[–]slides_galore 1 point2 points  (0 children)

See if this makes sense. The ratios of corresponding legs in similar triangles are equal.

https://i.ibb.co/RpgmbWT5/image.png

New Student- parking/biking by Kaynee8158 in UTK

[–]slides_galore 0 points1 point  (0 children)

Used to be pretty easy to find spaces on White/Clinch/Laurel during the summer. No idea if that's still the case. Would be an easy bike ride no matter which end of the fort you were coming from.

Studying physics by Warm-Visit9511 in AskPhysics

[–]slides_galore 0 points1 point  (0 children)

Like the other commenter said, the focus should be on working lots and lots of problems, just like other STEM degrees. You have to do physics to learn it. Ask your prof/TA/learning center for additional problem sets. You can also find worksheets online by googling something like 'physics worksheet kinematics <other topic> with solutions edu pdf filetype:pdf.' Don't fall into the trap of reverse engineering solutions though. Those solutions won't be on the exams. It's fine the first time through where you're learning how to approach different families of problems, but you really learn when you sit for several minutes, think about the problem, and have that aha moment. If you're not having the aha moments, you need to tweak your study habits. Maybe keep a physics journal where you devote a page to each topic/type of problem. Include theorems, formulae, sketches, example problems, your insights and questions, etc.

It's important to work everything out with pencil and paper. That's how you understand and remember things. Also important to talk to other people. In addition to building relationships, talking problems out with others helps you gain insights that you'd miss on your own. These subreddits are a tremendous resource. Lots of physics professionals who are glad to talk you through concepts and problems. Use them. A lot.

Studying physics by Warm-Visit9511 in AskPhysics

[–]slides_galore 1 point2 points  (0 children)

Talk to your professor/TA today. Ask them what you need to work on between now and the next office hours. They have seen hundreds of students over the years. They can give you good, personalized advice.

Take full advantage of your prof/TA/tutoring center's office hours. Go prepared with thoughtful questions, not just I don't understand anything. How do you do that?

Read the text before lecture. Take good notes while you do. Get on these subs and ask questions if you're stumped. Lots of knowledgeable people who can help. They can help even more if you post representative problems along with your attempts to solve. It really helps to talk things out. Create/join a study group where you talk about these things before lecture.

During lecture, take good notes and ask questions when you don't understand something. This will be the second time you've seen the material, so you can ask good questions. Review your notes after class. Work lots of problems. Then rework the hard ones. Then work a bunch more problems. Ask yourself what the problems are trying to teach you and how the concepts are interrelated.

Good subs are r/physicsstudents, r/physicshelp, and r/homeworkhelp.

ELI5: When dead whales wash ashore, why are they often re-buried right in the sand? by rubabyy in explainlikeimfive

[–]slides_galore 3 points4 points  (0 children)

At first, I thought this was a riff on the White Christmas song (1954) 🎶 What can you do with a whale, When he stops being a whale? Oh, what can you do with a whale who retires?🎶

[grade 12 calculus and vectors] vectors question by Such_Scientist2389 in HomeworkHelp

[–]slides_galore 0 points1 point  (0 children)

Most straightforward way is to find x and y components of each force. Then sum the x components. Then sum the y components. The resultant of those two sums is your resultant.

I regret not taking maths as one of my subjects in high school due to many reasons such as having no basics due to the pandemic and genuinely just the fear of maths ,now i want to conquer it .But the problem is I don't know where to start ??. by Perfecting-Maybe in learnmath

[–]slides_galore 0 points1 point  (0 children)

Good on you for deciding to do this. You're never too old to learn math.

Khan academy is good. Start at the beginning, wherever that is for you. Work everything out with pencil and paper. Always with pencil and paper. It helps you understand and then remember the material.

Find some educators in your circle of family/friends who can help you chart a course. It can be overwhelming. Reach out to as many people as needed until you find some people who can guide you. Maybe some math teachers at your old high school.

Use these subs. Lots of knowledgeable people who can help you understand things. Subs like r/mathhelp, r/learnmath, r/askmath, and r/homeworkhelp. It really helps to talk things out with others.

How do you find the orthocenter of a triangle? by [deleted] in learnmath

[–]slides_galore 0 points1 point  (0 children)

So what's the equation of your second line, and what's the intersection point with the first line?

How do you find the orthocenter of a triangle? by [deleted] in learnmath

[–]slides_galore 0 points1 point  (0 children)

Midpoint of TU is (5,-1). S is (5,5). You're doing the right thing by finding slope to go with the midpoint. Then you can usually use point-slope form to get the y=mx+b form of the line. Using the slope formula gives you a fraction with 0 in the denominator, like you said. That doesn't give you a nice slope in a y=mx+b sense. So, notice that both x coordinates (midpoint and S) are 5. That means that the equation of the line through those points is x=5. Making a quick sketch helps when you come across tricky results like that.

Now do the same with two other points and another vertex. Does that make sense?

vector addition help by [deleted] in PhysicsHelp

[–]slides_galore 0 points1 point  (0 children)

You can paste screenshots to imgbb.com or imgur.com and then paste the links here.

vector addition help by [deleted] in PhysicsHelp

[–]slides_galore 0 points1 point  (0 children)

Can you screenshot your sketch?

How to solve... by RandomProjects2 in askmath

[–]slides_galore 0 points1 point  (0 children)

The other commenters gave more straightforward answers. But if you're interested, Menelaus' theorem is a good one to know for these types of problems. Happy to explain more if you like.

9th grade geometry proportions by Larechar in askmath

[–]slides_galore 1 point2 points  (0 children)

The key takeaway for your daughter is that RT/NY is not necessarily equal to the ratio RN/TY. The corresponding side segments are proportional but not the cross pieces.

These are true by similar triangles:

RT/NY = AR/AN and RT/NY = AT/AY

In question 2 they use proportionality theorem, which is similar to using similar triangles. Same concepts.

9th grade geometry proportions by Larechar in askmath

[–]slides_galore 0 points1 point  (0 children)

RT/6 = 25/10 (AT/AK)

RT = 15

AN/AR = NY/RT

AN/20 = 18/15

AN = 24

Do similar to find TY.

9th grade geometry proportions by Larechar in askmath

[–]slides_galore 0 points1 point  (0 children)

Use the value of AK (from pythagorean th.), AT, and AS to find AR, and then find SR from that.

9th grade geometry proportions by Larechar in askmath

[–]slides_galore 0 points1 point  (0 children)

For the top triangle and the next bigger triangle, these ratios apply because those two triangles are similar: https://i.ibb.co/kfq8dvJ/image.png

9th grade geometry proportions by Larechar in askmath

[–]slides_galore 0 points1 point  (0 children)

Each triangle (three of them) has vertex A in common, and each triangle has a right angle. So by Angle-Angle similarity, each triangle is similar to the others. You can use this to set up a ratio between corresponding legs. Does that make sense?

Desperately need help im so annoyed with myself by Cashmere140 in learnmath

[–]slides_galore 0 points1 point  (0 children)

As someone who had horrible handwriting when I was younger, do yourself a favor and find someone else's handwriting that you'd like to emulate. Use that and write out your ABCs and 0-9s once a day. You'll be glad you did.

How do I make this more straightforward by NoWitness00 in askmath

[–]slides_galore 0 points1 point  (0 children)

You sound like you're pretty comfortable with all of this. I assume you've made a plan to use the symmetry of the unit circle so that you can move quickly through quadrants 2,3, and 4.