<u>A) </u> height =
.
<u>B) </u> height =
.
<u>Step-by-step explanation:</u>
Here , We need to calculate height of triangles let's do this :
A)
We draw a perpendicular from vertex to base line (8 cm ) , so length becomes 4 cm of base of triangle .
By Pythagoras Theorem we have ,

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Therefore , height =
.
B)
We draw a perpendicular from vertex to base line (14 cm ) , so length becomes 7 cm of base of triangle .
By Pythagoras Theorem we have ,

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⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
Therefore , height =
.