Triangles

Question 0

Isosceles triangle

Answer 0

Two side are the same length, and the angles facing those sides are equal.

Question 1

Equilateral triangle

Answer 1

All interior angles are 60 degrees, and all sides are the same length.

Question 2

Right triangles

Answer 2

Right triangles contain a 90 degree angle. The sides that form the 90 degree angle are the legs; the side facing the 90 degree angle is the hypotenuse. The sides are related by the Pythagorean theorem a2 +b2= c2, where a and b are the lengths of the legs, and c is the length of the hypotenuse.

Question 3

What are the special right triangles?

Answer 3

3: 4:5
5: 12:13

45 degree: 45 degree: 90 degree

30 degree: 60 degree: 90 degree

Question 4

What is the side lengths ratio of a 45 degree: 45 degree: 90 degree triangle?

Answer 4

1:1:✔️2

It’s an isosceles right triangle.

Question 5

What is the side lengths ratio of a 30 degree:60 degree:90 degree triangle?

Answer 5

1:✔️3:2

Question 6

What is always the sum of the angles in a triangle?

Answer 6

180 degrees

Question 7

What is the formula to find out the area of a triangle?

Answer 7

1/2 x base x height = area