Question

In the figures given below, $\angle ABC=$ and $\angle DEF=$

• A. ${90}^{\circ }$
• B. ${50}^{\circ }$
• C. ${130}^{\circ }$
• D. ${180}^{\circ }$

Answer 1

Answer: (A), (C)

${130}^{\circ }$

An angle’s measure is the number of 1-degree angles it rotates through. Each tick mark is 1 degree.
Here arm BC coincides with the right edge of protractor, so we're gonna read inside numbers of the protractor.

In this angle, one arm passes through $0^{\circ }$ and the other arm passes through ${90}^{\circ }$ degrees.
$\therefore$The angle $\angle ABC$ measures ${90}^{\circ }.$


Here arm ED coincides with the left edge of protractor, so we're gonna read outside numbers of the protractor.

In this angle, one arm passes through $0^{\circ }$ and the other arm passes through ${130}^{\circ }$ degrees.
$\therefore$The angle $\angle DEF$ measures ${130}^{\circ }.$