What is the sum of angles in a triangle?
90 degrees
360 degrees
180 degrees
270 degrees
In triangle ABC, if angle A = 40\degree and angle B = 90\degree, what is angle C?
30 degrees
60 degrees
100 degrees
50 degrees
What type of triangle has all sides of equal length?
Scalene triangle
Right triangle
Isosceles triangle
Equilateral triangle
Which formula is used to calculate the area of a triangle?
\pi \times radius^2
side^2
base \times height
\frac{1}{2} \times base \times height