# Triangles By Christine Berg Edited By VTHamilton

## Presentation on theme: "Triangles By Christine Berg Edited By VTHamilton"— Presentation transcript:

Triangles By Christine Berg Edited By VTHamilton

Can be classified by the number of congruent sides
Triangles Can be classified by the number of congruent sides

Scalene Triangle Has no congruent sides

Has at least two congruent sides
Isosceles Triangle Has at least two congruent sides

Has three congruent sides
Equilateral Triangle Has three congruent sides

Can be classified by the angle measures
Triangles Can be classified by the angle measures

Right Triangle Has one right angle

Acute Triangle Has three acute angles

Triangle with one obtuse angle
Obtuse Triangle Triangle with one obtuse angle

Cut any shape triangle out of a sheet of paper
Triangles Cut any shape triangle out of a sheet of paper

Tear off the corners. Piece them together by having the corners touch.
Triangles Tear off the corners. Piece them together by having the corners touch.

The corners form what type of angle?
Triangles The corners form what type of angle?

The sum of the angles of a triangle is 180 degrees
Triangles The sum of the angles of a triangle is 180 degrees

To find a missing angle, add up the 2 given angles
Triangles To find a missing angle, add up the 2 given angles

Subtract the sum from 180 and you have the missing angle
Triangles Subtract the sum from 180 and you have the missing angle

Congruent Triangles

Have the same SIZE and the same SHAPE
Congruent Triangles Have the same SIZE and the same SHAPE

May be flipped and/or rotated
Congruent Triangles May be flipped and/or rotated

Congruent Triangles BE CAREFUL WHEN YOU NAME THE SHAPE

Name congruent CORRESPONDING parts
Congruent Triangles Name congruent CORRESPONDING parts (sides and angles) IN ORDER

Make sure the letters are in CORRESPONDING order
Congruent Triangles Make sure the letters are in CORRESPONDING order

ABC is congruent to DEF B F E D A C

One for you Name the congruent triangles remembering to name the angles in order F E Z D Y X