Geometry MCQs, geometry quiz answers 5 to learn high school math courses online. Circles multiple choice questions (MCQs), geometry quiz questions and answers for online school degrees. Circles, radius of circle, lines and angles, polygon test for high school teacher certification.

Learn high school math multiple choice questions (MCQs): if radius of a circle is increased by 30% then its area is increased by, with choices 69%, 40%, 70%, and 50% for online school degrees. Free math study guide for online learning circles quiz questions to attempt multiple choice questions based test.

MCQ: Circumference of circle is calculated by

1. 2πr
2. 2π⁄r
3. πr⁄2
4. πr

A

MCQ: If radius of a circle is increased by 30% then its area is increased by

1. 40%
2. 69%
3. 70%
4. 50%

B

MCQ: Area of circle is calculated by

1. π⁄r²
2. πr²
3. π²r
4. r²⁄π

B

MCQ: Angles that are exactly 90° are known as

1. acute angles
2. reflective angles
3. obtuse angles
4. right angles

D

MCQ: A polygon having 9 sides is called

1. decagon