Triangles

Classifying TrianglesAdd the following to your math notes.The sum of the angle measures of EVERY triangle is 180.180

Find the value of x5565xFind the value of x28x135Find the value of x3679xFind the value of x45xEvery triangle can be classified by its angles and by its sides.Classifying Triangles by AnglesIf EVERY angle is less than 90,it is an ACUTE Triangle.one is fat If the measure of ONE angle is more than 90its an OBTUSE triangle. all the sameIf the measure of EACH angle is equal, it is EQUIANGULAR.If ONE angle measures 90, it is a RIGHT triangle. Classifying Triangles by Sidesit is SCALENE.No sides the sameIf none of the sides have the same length,it is an ISOSCELES triangle. Ifat least two sides measure the same,Try to think of an isosceles triangle as a person.The arms would be attached on the congruent sides.

The point shared by the congruent sides is the head.

The two other points represent the feet.

The angles by the feet are always congruent.

Try to figure out which angles are equal.

Be careful, your triangle might be tired.

all the sides equalEQUILATERAL. If the measure of EACH side is equal,it is All equilateral triangles are also equiangular.Can a triangle beright and isosceles?What is the measure of the other 1 two angles? 2A.right triangleisosceles triangle4545B.acute triangleequilateral triangleequilangular triangle606060C.acute triangleisosceles triangle506565D.2817obtuse trianglescalene triangle135E.3679acute trianglescalene triangle65F.acute trianglescalene triangle416871G.obtuse trianglescalene triangle2510055H.120obtuse triangle3030isosceles triangle