Answer:
45.2°
Step-by-step explanation:
a = 14
b = 11
c = 10
The Law of Cosines is given as:
arccos (a²+b²﹣c²/2ab)
In this above question, to find m
= arccos(11²+14²﹣10²/2·11·14)
= 45.20717°
Approximately = 45.2°
Option d is the correct answer
Answer: 18 units squared.
Step-by-step explanation:
Assuming you meant the height was 9 and the base was 4, or that the base was 9 and the height was four, simply do A = 1/2bh to get 18.
Answer:
Give me heart and 5 stars I don’t need your smile
Step-by-step explanation:
You are given the perimeter of a rectangle of 20 inches. You are also
given the length of the rectangle in 3 inches. Note that the perimeter of a
rectangle is 2L + 2W where L represents the length and W the width. Also, the
area of the rectangle is length times width.
P = 2L + 2W
20 inches = 2(3 inches) + 2W
2W = 20 – 6
2W = 14
W = 7 inches
A = L*W
A = (3 inches)(7 inches)
<u>A = 21 square inches</u>