Trigonometry and Shapes

Question 1

How do you identify an isosceles triangle?

Answer 1

Two equal sides must have the same base angles. Angles must add up to 180*.

Question 2

How do you identify an equilateral triangles?

Answer 2

Three 60* angles, must be the same length on every side. Angles must add up to 180*.

Question 3

How do you identify a right-angled triangle?

Answer 3

Must have a 90* angle. Angles must add up to 180*.

Question 4

How do you calculate the area of a triangle?

Answer 4

Half the base times the height.

Question 5

What does SohCahToa mean?

Answer 5

Sine = Opposite/Hypotenuse
Cosine = Adjacent/Hypotenuse
Tangent = Opposite/Adjacent

Question 6

How do you do Soh?

Answer 6

https://www.mathsisfun.com/algebra/sohcahtoa.html

Sin(30*) = opposite (1) over hypotenuse (2) = 0.5

Question 7

How do you do Cah?

Answer 7

https://www.mathsisfun.com/algebra/sohcahtoa.html

Cos(30*) = adjacent (1.732) over hypotenuse (2) = 0.866…

Question 8

How do you do Toa?

Answer 8

https://www.mathsisfun.com/algebra/sohcahtoa.html

Tan(30*) = opposite (1) over adjacent (1.732) = 0.577…