Question

Use the table below and identify an obtuse angle from the given options.

$\begin{array}{cc}\text{Type of angle}& \text{Description}\\ \text{Acute angle}& \text{Less than}{90}^{\circ }\\ \text{Right angle}& \text{Equal to}{90}^{\circ }\\ \text{Obtuse angle}& \text{Greater than}{90}^{\circ }\\ & \text{\& less than}{180}^{\circ }\\ & \end{array}$

• A. ${90}^{\circ }$
• B. ${89}^{\circ }$
• C. ${142}^{\circ }$
• D. ${230}^{\circ }$

Answer 1

The correct option is C ${142}^{\circ }$

An angle whose measure is greater than a right angle and lesser than a straight angle is called an obtuse angle.

${142}^{\circ }$ is the only angle that lies between ${90}^{\circ }$ and ${180}^{\circ }.$ Thus, it is an obtuse angle.