If A=78º, b=16, c=7, what is the area of this triangle?

Mathematics

1 answer:

Andrei [34K]3 years ago

8 0

Answer:

= 54.78 square units

Step-by-step explanation:

We can calculate the area of the triangle using the formula;

Area = 1/2abSinθ ; where a and b is the sides making the angle θ.

Therefore;

Area = 1/2 bc sin C

= 1/2 × 16 × 7 × Sin 78

= 8 × 7 × sin 78

<u>= 54.78 square units</u>

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Kali spent half of her weekly allowance on clothes. To earn more money her parents let her clean the gutters for $9. What is her

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So to find the answer to this, you have to consider that $\frac{1}{2} x + 9 = 13$ - half because half the pocket money (x) was spend on clothes, then plus 9 because that's how much extra she gained and 13 because that was the result of all the changes.

To solve this, first subtract 9 from both side, which leaves you with $\frac{1}{2} x = 4$ and $\frac{1}{2} x$ is the same as $\frac{1x}{2}$ , so to solve this, multiply both sides of the equation by two, resulting in $x = 8$ . SO from this we can conclude that the weekly allowance is $8