Core geometry vocabulary and formulas covering shapes, angles, perimeter, area, and volume for middle school geometry.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is an acute angle?
- An angle that measures less than 90 degrees.
- What is a right angle?
- An angle that measures exactly 90 degrees.
- What is an obtuse angle?
- An angle that measures between 90 and 180 degrees.
- What are complementary angles?
- Two angles whose measures add up to 90 degrees.
- What are supplementary angles?
- Two angles whose measures add up to 180 degrees.
- What is the sum of all angles in a triangle?
- 180 degrees.
- What is the sum of all angles in a quadrilateral?
- 360 degrees.
- What is perimeter?
- The total distance around the outside of a shape.
- What is the formula for the area of a rectangle?
- length times width, or A = l * w
- What is the formula for the area of a triangle?
- A = (1/2) * base * height
- What is the formula for the area of a circle?
- A = pi * r squared, or A = pi * r^2
- What is the formula for the circumference of a circle?
- C = 2 * pi * r, or C = pi * d
- What is the radius of a circle?
- The distance from the center to any point on the circle.
- What is the diameter of a circle?
- The distance across the circle through its center.
- State the Pythagorean theorem.
- In a right triangle, a squared plus b squared equals c squared, or a^2 + b^2 = c^2