Work out the height of this triangle b = 4.7mm

A= 107.16mm2

B=base

A=area

Step-by-step explanation:

area of triangle =B*H/2

107.16=4.7*H/2

107.16*2=4.7*H

214.32/4.7=H

46.6=H

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.