Question

Please help me idk this

Answer 1

Answer:

h = 18 cm

Step-by-step explanation:

$A=\dfrac{bh}{2}\\\\A=117\ cm^2\\b=13\ cm$

Substitute:

$117=\dfrac{13h}{2}$               multiply both sides by 2

$234=13h$            divide both sides by 13

$18=h\to h=18\ cm$