triangles

If one angle of a triangle is equal to the sum of other two angles, then the triangle is ______

• an isosceles triangle

• an obtuse triangle

• an equilateral triangle

• a right triangle

Say 'TRUE' or 'FALSE'
The angles of a triangle may be 90°, 20°, 90°

• TRUE
• FALSE

A triangle that has angles measuring 90 degrees, 45 degrees, and 45 degrees with two congruent (equal) sides is called a______________.

• Scalene Acute

• Isosceles Right

• Scalene Right

• Equilateral Acute

An _____________ triangle is a triangle with one obtuse angle and two acute angles.

• Scalene Triangle

• Right Triangle

• Obtuse Triangle

• None of these

What is the characteristics of an Equilateral triangle?

• Two sides are equal

• All three sides and all three angles are equal

• No sides are equal

• acute

• obtuse

• right

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What is the name of this kind of triangle?

• Right
• Isosceles
• Scalene
• Equilateral

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What is the name of this kind of triangle?

• Right
• Scalene
• Isosceles
• Equilateral

Classify the triangle by angles and sides.

• Equiangular Equilateral
• Right Isosceles
• Right Scalene
• Acute Isosceles