Question

In $\Delta PQR,\angle Q={23}^o$ and $\angle R={20}^o.$ What is the measure of $\angle P?$

• A. ${134}^o$
• B. ${135}^o$
• C. ${136}^o$
• D. ${137}^o$

Answer 1

Answer: (D)

${137}^o$

By angle sum property, the sum of angles is ${180}^o$.

$\angle P+\angle Q+\angle R=180$

$\angle P+{23}^o+{20}^o={180}^o$
$\angle P={180}^o-{43}^o$
$\angle P={137}^o.$