Which type of angle is shown below?
- obtuse angle
- right angle
- acute angle
- straight angle
An obtuse angle measures between 90 and 180 degrees.
A right angle measures 90 degrees.
An acute angle measures between 0 and 90 degrees.
A straight angle measures 180 degrees.
Which classification describes the angle pair shown?
- right angles
- supplementary angles
- adjacent angles
- complementary angles
Right angles measure exactly 90 degrees.
Supplementary angles sum to 180 degrees.
Adjacent angles share a common side and common vertex.
Complementary angles sum to 90 degrees.
Which equation should be used to solve for the unknown variable, x, in the image below?
A 180 degree angle consisting of two angles: angle CBA and angle ABD. angle CBA is labelled with the equation 5x-18. angle ABD is labelled with the equation 4x+45.
- \(5x − 18 + 4x + 45 = 180\)
- \(5x − 18 + 4x + 45 = 90\)
- \(5x − 18 = 4x + 45\)
- \(5x − 18 + 4x + 45\)
This equation is for a linear pair of angles.
This equation is for a complementary pair of angles.
This equation is for a pair of vertical angles.
This is an expression and not an equation. The equal sign is missing.
Summary
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