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MatroZZZ [7]
3 years ago
6

Can someone please help me on 3,4, and 5

Mathematics
2 answers:
alexandr1967 [171]3 years ago
8 0
A=45 b=60 c=90 I think
mamaluj [8]3 years ago
3 0

This is algebra and rearranging equations.

Let's start with question 3. The sum of all the angles in the triangle is 180 degrees. Therefore, 45 + 2k + k = 180. We can solve this:

180 - 45 = 3k by rearranging the equation so 135 = 3k, so k = 135/3 = 45 degrees. We can now see that the triangle is isosceles, with two angles being both 45 degrees.

The other two follow the same process:

4: a + 2a + 2a+ a = 360 so 6a = 360

a = 360/6 = 60 degrees

5: b + 3/2 b+ (b+45) + (2b-90) + 90 = 540

5b + 1/2b + 45 = 540 (because the -90 and +90 cancel each other out)

so 5 1/2b = 495

b = 90

If you use each letter and substitute in the values into the angles, you will find that they all add up to the sum of angle measures of each shape.

Hope I helped!

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The percentage error is 23%

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Thus,

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error value = 65-50=15

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$\begin{aligned} \text { Percent error } &=\left(\frac{15}{65}\right) \times 100 \\ &=0.231 \times 100 \\ &=23.1 \end{aligned}$

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The area of a rhombus can be calculated with the following formula:

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\frac{135\ in^2}{15\ in^2}=9

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