Area of an equilateral triangle with side length a is equal to:
If triangles ABC and DEF are similar and AB=4 cm, DE=6 cm, EF=9 cm and FD=12 cm, the perimeter of triangle is:
What is the third angle for the triangle where angle1 = 45 and angle2 = 60?
If two sides of a triangle are not equal, the triangle is called
If one angle of a triangle measures 90°, the triangle is called