(-8.6)+7.2= -1.4
Think of it as 8.6-7.2 and carry down the negative sign.
Answer:

Step-by-step explanation:
According to the trigonometric ratios in aright triangle :

Given: ΔBCA ~ ΔSTR
Since , corresponding angles of two similar triangles are equal.
So, ∠C = ∠T ...(i) [Middle letter]
In triangle STR
...(ii)
From (i) and (ii), we have

Answer:
A= ( 5 x 3 ) x [(9-5)x3 divided by 2]
15+6
=21
P= 5+5+3+9
=22
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