Humanities Math 103 Unit 3 Flashcard #1

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

How do you find the measure of a missing angle in a triangle?

Back

To find the measure of a missing angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is the relationship between the diameter and radius of a circle?

Back

The radius is half of the diameter. If the diameter is 10 m, the radius is 5 m.

Front

What is the formula for the circumference of a circle?

Back

The circumference (C) of a circle is calculated using the formula C = πd, where d is the diameter.

Front

What is the formula for the area of a circle?

Back

The area (A) of a circle is calculated using the formula A = πr², where r is the radius.

Front

What is the definition of a radius in a circle?

Back

A radius is a line segment from the center of the circle to any point on the circle.

Front

What is the definition of an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the measure of an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is the measure of an obtuse angle?

Back

An obtuse angle measures more than 90 degrees but less than 180 degrees.