Answer:
A-because 1/3 is always the start after 0
Step-by-step explanation:
The only thing I'm a little unclear on here is what you mean by
the "legs" of an isosceles triangle.
I'm going to assume that your isosceles triangle is standing on
the side you call the "base", and the "legs" are the two slanty ones,
standing up, which are the two equal sides.
With that set-up, x + 1 = -x + 7
Add x to each side: 2x + 1 = 7
Subtract 1 from each side: 2x = 6
Divide each side by 2 : x = 3
Finally, if the base is (3x - 3), then that's (3·3 - 3) = 6 .
Answer:
Step-by-step explanation:
Given
Solving (a) and (b):
See attachment for plot and labelled vertices
Solving (c): The area
This is calculated using:
Where:
-- 
-- 
-- 
This gives:
This gives
Answer:
x = 124°
Step-by-step explanation:
the sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
here n = 5 , then
sum = 180° × 3 = 540°
sum the given angles and equate to 540°
90° + 122° + 105° + 99° x = 540° , that is
416° + x = 540° ( subtract 416° from both sides )
x = 124°
