Question

how many angles are there inside a quadrilateral?

______ angles

question 15

how many sides does an undecagon have?

______ sides

Explanation:

Step1: Recall the definition of a quadrilateral

A quadrilateral is a polygon with 4 sides and 4 angles.

Step2: Recall the definition of an undecagon

An undecagon is a polygon. The prefix "undeca -" means 11. So, an undecagon has 11 sides.

Answer:

4 angles
11 sides