Answer:
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Answers:</h3>
14. Each leg is
units long.
15 (a). The longer leg is
units long
15 (b). The hypotenuse is
units long
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Explanations:
For a 45 degree right triangle, aka 45-45-90 triangle, the hypotenuse is equal to sqrt(2) times the short leg. Algebraically we can say
where x is the leg and y is the hypotenuse
Let's solve for x

Now plug in the given hypotenuse y = 42, this leads to,

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For a 30-60-90 triangle, the hypotenuse is double that of the short leg. So the hypotenuse is 2*7 = 14.
The longer leg is equal to sqrt(3) times the short leg. The longer leg is 
Answer:
10 sides
Step-by-step explanation:
(28x+4)°+(5x+11)°=180°
28x+5x+11°+4°=180°
33x+15°=180°
33x=180-15
33x=165°
X=5.
Interior =(28×5)+4=144°
Exterior=(5×5)+11°=36°
No. of sides=360°\exterior
360°\36
10.