Terms and Labels in Geometry Triangles

Find the measure of the missing angle in the triangle.

An obtuse triangle has (a)   ​

• one obtuse angle

• three obtuse angles

• one acute angle

Use the angles to classify the triangles

Use the sides to identify the triangle

0 sides the same - scalene triangle

2 sides the same - isosceles triangle

3 sides the same - equilateral triangle

If the base of the triangle is 9cm, then the height is ........?

• 6m

• 8cm

• 14cm

• 6cm

A triangle with 1 angle that measures EXACTLY 90 degrees, which is shown with a box, is called a ___.

• obtuse triangle

• acute triangle

• right triangle

A triangle with no congruent sides and no congruent angles is called a ___.

• equilateral triangle

• isosceles triangle

• scalene triangle

a triangle with one right angle

• acute triangle

• right triangle

• obtuse triangle

• scalene triangle

A triangle with three congruent sides

• scalene triangle

• right triangle

• isosceles triangle

• equilateral triangle

a triangle with at least two congruent sides

• scalene triangle

• equilateral triangle

• isosceles triangle

• right triangle