Triangles

The sum of any two sides of a triangle is always

1. Equal to the third side
2. Less than the third side
3. Greater than the third side
4. Twice the third side

Which congruence criterion is applicable only to right triangles?

1. SAS
2. SSS
3. RHS
4. ASA

If one exterior angle of a triangle is 130° and one opposite interior angle is 55°, the other opposite interior angle is

1. 65°
2. 70°
3. 75°
4. 80°

Which side of a triangle is opposite the largest angle?

1. Smallest side
2. Largest side
3. Equal side
4. Any side

If two sides of a triangle are equal, the triangle is

1. Scalene
2. Isosceles
3. Equilateral
4. Right

If the angles of a triangle are 60°, 60°, and 60°, the triangle is

1. Right triangle
2. Obtuse triangle
3. Equilateral triangle
4. Scalene triangle

In a triangle, if one angle is 90°, the triangle is called a

1. Acute triangle
2. Obtuse triangle
3. Right triangle
4. Scalene triangle

The exterior angle of a triangle is equal to

1. Sum of the two interior opposite angles
2. Difference of the two opposite angles
3. Product of the two opposite angles
4. Sum of all three interior angles

If three sides of one triangle are equal to the corresponding sides of another triangle, the triangles are congruent by

1. SAS
2. SSS
3. ASA
4. AAA

Which of the following is NOT a congruence criterion?

1. SSS
2. SAS
3. AAA
4. ASA

Which congruence criterion uses two angles and the included side?

1. SAS
2. ASA
3. SSS
4. RHS

If two angles of a triangle measure 45° and 65°, then the third angle is

1. 60°
2. 70°
3. 75°
4. 80°

The sum of the interior angles of a triangle is

1. 90°
2. 180°
3. 270°
4. 360°

Which of the following conditions is sufficient to prove that two triangles are congruent?

1. AAA (Angle-Angle-Angle)
2. SAS (Side-Angle-Side)
3. AAA with equal perimeter
4. Equal area only