All About Angles and Triangles!

Classifying Angles

100

Angles that are less than 90 degrees

Acute

200

Angles that are equal to 180 degrees

Straight angles

300

Angles that are equal to 90 degrees

Right angles

400

Angles that are greater than 90 degrees but less than 180 degrees

Obtuse angles

500

The number of degrees total in a triangle

180 degrees

600

What are the 3 types of angles?

Acute, Obtuse, and Right.

Types of Triangles

100

Triangles that have all sides equal

equilateral triangles

200

Triangles that have no equal sides

scalene triangles

300

Triangles that have two equal sides

isosceles triangles

400

Triangles that have three angles less than 90 degrees

acute triangles

500

Triangles that have one angle greater than 90 degrees

obtuse triangles

600

Triangles that have one 90 degree angle

right triangle

Angle Measures

100

The little box in the corner of a triangle or any figure represents what?

A right angle

200

What is the measure of each interior angle of an equilateral triangle?

60 degrees

300

How many angles are in a triangle?

3

400

Can a triangle have these angle measures? 

30, 60, 90.

Yes they add up to 180.

500

Write down the 3 types of triangles by sides.

Scalene, Equilateral, Isosceles

600

Who does Mr Illman support in Soccer

Liverpool.

Miscellaneous

100

The name given to two angles with a sum of 180 degrees?

What is supplementary angles?

200

The name given to two angles with a sum of 90 degrees.

What is complementary angles?

300

Vertically Opposite Angles are......

equal

400

What is the supplementary angle of 72^o?

108^o

500

True or False

        A right triangle will always contain a right angle and two acute angles.

Justify your answer.

TRUE...there are always 2 acute angles in every triangle, the third angle names it!

600

Two angles in a triangle are 50^o and 60⁰. What is the size of the other angle?

70^o