Classify Triangles on Sides and Angles

A triangle in which all the three sides are unequal in length is called a __________.

• Scalene

• Isosceles

• equilateral

• acute

An isosceles triangle is a triangle in which exactly two sides are the same length.

• True

• False

A triangle in which have all its three sides equal in length is called an _______________

• scalene

• isosceles

• equilateral

• acute

classify the triangle whose sides are:

4 cm, 4 cm and 7 cm.

• Scalene

• Isosceles

• Equilateral

• right

classify the triangle according to its angles

• obtuse

• acute

• right

• isosceles

a triangle in which any one of the three angles is exactly 90°, is known as a right-angled triangle.

• True

• False

A triangle with 3 congruent sides is called a(n) ______

• Isosceles Triangle

• Equilateral Triangle

• Obtuse Triangle

• Irregular Triangle

Classify this triangle by its sides and angles.

A triangle has angle measurements of 20°, 140°, and 20°

• acute

• obtuse

• isosceles

• equilateral

A triangle can be classified as an isosceles triangle if there are two equal sides.

• True

• False

isosceles triangle has _________

• 2 sides equal

• 3 sides equal

• all sides are different

• none of the above