Classify Triangle

Find the measure of the missing angle in the triangle.

Classify this triangle.  Make sure list ALL the names.

• Scalene, Acute

• Scalene, Obtuse

• Equilateral, Obtuse

• Equilateral, Acute

What is the perimeter of the triangle shown?***Perimeter is the SUM of ALL sides!***

• 9r² + r - 5

• 9r⁴ + r² - 4

• 9r² - r + 4

• 9r² + r - 4

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

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

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

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

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

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

Use the angles to classify the triangles