Lines, Angles, Triangles, and Quadrilaterals

An angle with a measure between 0° and 90°

• Obtuse Angle

• Right Angle

• Acute Angle

An angle with a measure of 180°

• Straight Angle

• Right Angle

• Obtuse Angle

An angle with a measure of 90°

• Acute Angle

• Straight Angle

• Right Angle

An angle with a measure greater than 90° but less than 180°

• Acute Angle

• Right Angle

• Obtuse Angle

a line that joins 2 vertices

• angle

• side

• vertex

These lines . . .

• form a square

• form a rectangle

• form a triangle

• form acute angles

All three angles have tge same length .

• Equilateral Triangle

• Isosceles Triangle

• Scalene Triangle

At least two side have the same length.

• Equilateral Triangle

• Isosceles Triangle

• Scalene Triangle

One angles is more than 90°

• Obtuse Triangle

• Right Triangle

• Acute Triangle

One angle measures 90°

• Acute Triangle

• Right Triagle

• Equiangular Triangle