Answer:
<u><em>Question 10.</em></u>
Length of the side of the square = 
By Pythagoras' Theorem,
Hypotenuse =
(H > 0)
= 29 m
Ans: 29 m
<u><em>Question 11.</em></u>
By Pythagoras' Theorem,
Length of longer side of 42 km = 42-
(L > 0)
= 32.050 km (5 s.f.)
By Pythagoras' Theorem,
Length of the unknown side =
(L > 0)
= 35.4 km (3 s.f.)
Ans: 35 km
<u><em /></u>
Answer: (-4) and 4
Step-by-step explanation: they are opposites
The formula is A= 1/2b x h
Area = half of the base multiplied by the height of the triangle
The answer is - 40. Observe.
y/-4 + 5 = 15
y = -40
-40/-4 = 10
10 + 5 = 15
Thus, y= -40