If the radius is 43, find the diameter.
2 answers:
Answer:
Diameter = 86 units
Step-by-step explanation:
What is radius and diameter?
- The radius of a circle is a straight line from the middle of a circle to its perimeter. The diameter of a circle is a straight line that touches the perimeter of the circle, then intersects with the center of the circle, and touches the perimeter of the circle again.
How do we find the diameter?
- The diameter of a circle is twice the radius, so 2 × 43 = 86 units
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Answer:
2.2 metres squared
Step-by-step explanation:
We need to find the area of this trapezoid.
The area of a trapezoid is denoted by:
, where
and
are the parallel bases and h is the height
Here, we already know the lengths of the two bases; they are 0.9 metres and 2.3 metres. However, we need to find the length of the height.
Notice that one of the angles is marked 45 degrees. Let's draw a perpendicular line from top endpoint of the segment labelled 0.9 to the side labelled 2.3. We now have a 45-45-90 triangle with hypotenuse 2.0 metres. As one of such a triangle's properties, we can divide 2.0 by √2 to get the length of both legs:
2.0 ÷ √2 = √2 ≈ 1.414 ≈ 1.4
Thus, the height is h = 1.4 metres. Now plug all these values we know into the equation to find the area:
The answer is thus 2.2 metres squared.
<em>~ an aesthetics lover</em>
