What is the third angle for the triangle where angle1 = 45° and angle2 = 45°?

45° 60° 90°

If a triangle has an angle of 90 degrees, what is it called?

obtuse actue right angled

Which of the following triangles have the same side lengths?

Scalene Isosceles Equilateral

Area of an equilateral triangle with side length a is equal to?

(√3/2)a (√3/2)a2 (√3/4) a2

D and E are the midpoints of side AB and AC of a triangle ABC, respectively and BC = 6 cm. If DE || BC, then the length (in cm) of DE is:

2.5 3 5

The diagonals of a rhombus are 16 cm and 12 cm, in length. The side of the rhombus in length is:

20 cm 8 cm 10 cm