Anybody know how to do this ?
2 answers:
Hey there!
In this diagram, x is the exterior angle of the triangle.
The measurement of the exterior angle is the sum of the other two interior angles (this formula only works for triangles).
The two interior angles have measurements of 50 degrees and 93 degrees.
We can just add those together to get the value of x.
The measurement of x is 143 degrees.
Have an awesome day! :)
~collinjun0827, Junior Moderator
In this diagram, x is the exterior angle of the triangle.
The measurement of the exterior angle is the sum of the other two interior angles (this formula only works for triangles).
The two interior angles have measurements of 50 degrees and 93 degrees.
We can just add those together to get the value of x.
The measurement of x is 143 degrees.
Have an awesome day! :)
~collinjun0827, Junior Moderator
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Answer:
Part 1)
Bob's mistake was to have used the cosine instead of the sine
The measure of the missing angle is
Part 2) The surface area of the pyramid is
Step-by-step explanation:
Part 1)
Let
x----> the missing angle
we know that
In the right triangle o the figure
The sine of angle x is equal to divide the opposite side angle x to the hypotenuse of the right triangle
Bob's mistake was to have used the cosine instead of the sine
Part 2) we know that
The surface area of the square pyramid is equal to the area of the square base plus the area of its four lateral triangular faces
so
where
b is the length side of the square
h is the height of the triangular lateral face
In this problem
-------> by an 45° angle
so
Find the value of b
Find the surface area