Answer:
The triangle C
Step-by-step explanation:
As we know:
The Law of Sines (or Sine Rule) is very useful for solving triangles:
where:
- a, b and c are sides.
- A, B and C are angles
Let analyse 3 answers:
a. Wrong, because we do not know the measure of each angle
b. Wrong, we do not the the lenght of side that is opposite the the angle 40°
c. True, we know the measure of the other missing angle is:
= 180° - 70°- 30°
= 80°
and we know one side is: 10m
Hence, using the Sine Law, we can find out the side of the other 2 sides of the triangles.
The distance/measurement around a circle.
The area of wood needed for the frame is 5. 5 + 106 square inches. Option A
<h3>How to determine the area</h3>
The amount of wood needed for the window frame will be equal to area of window frame.
It is important to note that the upper part of window is semicircle
Area of the upper part = π
where,
R = Outer radius,
r = Inner radius.
Area of upper part = π ×
Area of upper part = 11π/2
Area of upper part = 5. 5π
To find the area of the lower part, it is important to note that the area of lower part of frame will be area of 3 different rectangles. Two are the same rectangles with length 48 inches and width 1 inch and one rectangle with length 10 inches (12-2) and width 1 inch.
Area of lower part = 2 × 48 × 1 + 10 × 1
Area of lower part = 96 + 10
Area of lower part = 106 inches
Thus, the area of wood needed for the frame is 5. 5 + 106 square inches. Option A
Learn more about area of a rectangle here:
brainly.com/question/25292087
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Answer:
2.1
Step-by-step explanation:
Work backwards 14.7 ÷ 7 = 2.1
Answer:
The equation has infinite solutions
Step-by-step explanation:
Linear equations can have zero, one or infinite solutions.
If Emma tested two values (3 and 5) for the same equation and they were both true solutions, this means that the equation has more than one solution.
If a linear equation has more than one solution, than the equation has infinite solutions.