# math

## what is a regular polygon

regular polygons have sides of equal lengths and angles of equal size

## what is a polygon

polygons are closed plane figures with straight sides. A side is also called an edge.

## what is a convex polygon

A convex plygon has all vertices pointing outwards and all interior angles are smaller than 180

## what is a non-convex (concave) polygon

Has at least one vertex pointing inward and at least one interior angle bigger than 180

## Name 5 polygons and the number of sides they have

triangle-3 sides

quadrilaterial-4 sides

pentagon-5 sides

hexagon-6 sides

heptagon-7 sides

octagon-8

nonagon-9

decagon-10

undecagon-11

dodecagon-12

## What are the three triangles

Scalene

isosceles

equilaterial

## What is the definition for a scalene triangle

3 different side

3 different angles

## what is the definition for a isosceles triangle

2 equal sides

2 equal angles

## what is the definition for a equilateral triangle

3 equal sides

3 equal angles (60 degrees)

## how much does every triangle need to add up to

180 degrees

## what is a parallelogram

2 pairs of parallel sides with equal lengths

2 pairs of matching angles

All interior angles add up to 360

## simplify the algerbratic expressions

7b+4a-6b+a

1b+4a

## simplify the algerbratic expressions

5a(2) +3a+2a(2) -2a

7a(2)+a

## whats a pronumeral

The letters used in algebra and they stand for numbers

## what is area

The anount of surface a shape covers

## what is perimeter

The ouside of a 2d shape

## what is a coefficient

The number in an expression