Exploring Shapes and Angles

What is the sum of the interior angles of a triangle?

Which of the following shapes has four equal sides and four right angles?

• Rectangle

• Square

• Parallelogram

• Trapezoid

What is the area of a rectangle with a length of 8 units and a width of 3 units?

If the radius of a circle is 5 units, what is the diameter of the circle?

What is the perimeter of a square with a side length of 7 units?