What is the answer to the question
1 answer:
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Answer:
m∠B = .
Step-by-step explanation:
Since the three sides of the triangle are given, then we apply cosine rule.
=
+
- 2ac Cos B
But, a = 660 cm, b = 680 cm, and c = 100 cm.
So that;
=
+
-2(660 x 100) Cos B
462400 = 435600 + 10000 - 132000 Cos B
462400 = 445600 - 132000 Cos B
132000 Cos B = 445600 - 462400
= -16800
Cos B =
= -0.1273
B = -0.1273
=
Thus, measure of ∠B is .
Answer:
-The total area of a Rectangular Prism:
Step-by-step explanation:
-To find the total area of a rectangular prism, you need this formula:
Length
Width
Height
-Apply the length, width and height for the formula:
11 in
8 in
5 in
-Then, solve for the area:
So, the total area would be
.