<u>Answer:</u>

<u>given:</u>
- adjacent side: 10
- hypotenuse side: 20
<u>using cosine rule:</u>




Approximate circumference of a semicircle with a radius of 30 centimeters is 94.2 centimeter
<em><u>Solution:</u></em>
Given semicircle with a radius of 30 centimeters
<em><u>To find: approximate circumference of a semicircle</u></em>
To find circumference of semicircle we can divide the circumference of circle by 2
circumference of semicircle = circumference of circle
2

Substituting the given radius = 30 cm,

Thus approximate circumference of a semicircle with a radius of 30 centimeters is 94.2 centimeter
He will take 1/3 load of rock on the last load
Answer:
x ≈ 30.7
Step-by-step explanation:
Reference angle = 61°
Opposite side length = x
Adjacent side length = 17
Applying the trigonometric function TOA, we have:
Tan 61 = opp/adj
Tan 61 = x/17
17 × Tan 61 = x
x ≈ 30.7