Triangles

Question 1

Isosceles triangle

Answer 1

Two sides are the same length and the angles facing those sides are equal

Question 2

Right triangles

Answer 2

Contain a 90 degree angle, sides forming this angle are the legs. Side facing this angle is hypotenuse. Pythagorean theorem relates the side lengths.

Question 3

3:4:5 right triangle

Answer 3

Side lengths in ratio of 3:4:5.

Question 4

5:12:13 triangles

Answer 4

Sides are in ratio 5:12:13

Question 5

45•-45•-90• right triangles (isosceles right triangles)

Answer 5

Side lengths in ratio 1:1:sqrt 2. Legs have same length. Formed when square is divided in half by one of its diagonals.

Question 6

30•-60•-90• right triangles

Answer 6

Side length ratio of 1:sqrt3:2. Shortest side is opposite the 30• angle. Formed when equilateral triangle is divided in half.

Question 7

Equilateral triangle

Answer 7

All interior angles are 60 degrees, all sides are same length