Answer:
131.88 cm²
Step-by-step explanation:
The surface area of a cylinder is 2πr² + 2πrh
Since the figure we are dealing here is a quarter of a cylinder, divide the equation by 4.
New equation =
We know:
r = 6 cm
h = 8 cm
Now substitute the values and solve:
= 131.88 cm²
Answer:
(d) 60°
Step-by-step explanation:
<u>Theorems</u>
- Interior angles of a triangle sum to 180°
- Angles on a straight line sum to 180°
Therefore, the <u>exterior angle</u> of a triangle is <u>equal to the sum</u> of the <u>two non-adjacent interior angles</u> of the triangle.
⇒ (a + 20) + (a + 10) = (a + 90)
⇒ a + 20 + a + 10 = a + 90
⇒ 2a + 30 = a + 90
⇒ 2a + 30 - a = a + 90 - a
⇒ a + 30 = 90
⇒ a + 30 - 30 = 90 - 30
⇒ a = 60
Answer:
∠a = 50°
∠b = 130°
∠c = 130°
Explanation:
Following Vertical Angles Theorem:
A straight line has 180° angle measure, ∠c and ∠a lies on a straight line
Also, following vertical angle theorem:
Answer:
<h2>-28x - 11</h2>
Step-by-step explanation:
If you want it simplified. Then adding like terms is the first step.
10x + -38x = -28x
Then simplify constants
36 - 47 = -11
-28x + -11 or -28x - 11
I'm always happy to help :)
Answer:
x=−0.25
Step-by-step explanation: