The interior angles of a parallelogram will always equal 360. The interior angles of a triangle are 180 if it is a equilateral triangle then the angles are 60 degrees each. You know 2 sides of parallelogram. The 100 degree and 90 degree. You can find the one opposing the x because it’s on a straight line and a straight line is 180 degrees if a triangle is 60 degree angle then the opposing angle to complete the straight line must be 180-60 so you get 120. You now know 3 sides. 120, 90 and 100
They should add up to be 360 so you can set up an equation like so
120+90+100+x=360
And x = 50
A point estimate of the mean is a number that is used to approximate the true value of said population parameter.
To find the point estimate of the mean we will use the associated sample parameter X-bar.
Since Xbar is an unbiased estimator of μ, then:
μ_X-bar = μ.
X-bar = 16.6
So:
The estimate of population mean = X-bar = 16.6
The measure of the missing angle(a) in the isosceles triangle(two sides and angle equal) is 70 degrees.
<h3>What is an Isosceles triangle?</h3>
An Isosceles triangle is a triangle that has two of it sides equal to each other and two of it angles equal to each other.
The base angle of an isosceles triangle are equal. Therefore, let's find angle a in the triangle.
55 + 55 + a = 180
Recall the sum of angle in a triangle is 180 degrees.
110 + a = 180
subtract 110 from both sides
110 - 110 + a = 180 - 110
a = 70 degrees
learn more on Isosceles triangle here: brainly.com/question/4264350
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Answer: 1) b = 2
2) c = 20
Explanation:
I hope this helped!
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