Question Type 4: Using cosine rule to find the 3rd side Bootcamps

In triangle DEF, sides $d=5$, $e=7$ and included angle $F=60°$. Calculate side $f$.

Triangle GHI has $g=10$, $h=14$ and angle $I=30°$. Find the length of side $i$.

In triangle ABC, sides $a=6$, $b=8$ and included angle $C=65°$. Find the length of side $c$.

In triangle JKL, $j=9$, $k=12$ and angle $L=120°$. Determine $l$.

Triangle STU has equal sides $s = t = 8$ and angle $U = 36°$. Find side $u$.

Triangle MNO has sides $m=4.5$, $n=7.2$ and angle $O=45°$. Find $o$.

In triangle BCD, $b=50$, $c=60$ and angle $D=25°$. Calculate $d$.

In triangle PQR, $p=15$, $q=20$ and angle $R=75°$. Calculate $r$.

In triangle VWX, $v=11$, $w=17$ and angle $X=92°$. Determine $x$.

Triangle YZA has $y=13.5$, $z=9.8$ and angle $A=110°$. Find side $a$.

Triangle EFG has $e=25$, $f=30$ and $G=150°$. Find $g$.

In triangle HIJ, $h=100$, $i=120$ and $J=5°$. Determine side $j$.