Step-by-step explanation:
x = 145°
we don't even need the upper parallel line with the 35° angle.
it is simply based on the fact that the angles on both sides of 2 intersecting lines have to be the same (just left-right mirrored).
Answer:
-10
Step-by-step explanation:
right on edge 2022
Given parameters:
Number of sides of the regular body = 10
A decagon has 10 sides.
Unknown:
Sum of the measures of the interior angles = ?
Solution;
To find the sum of the interior angles of a decagon; use the expression below:
Sum of interior angles = (n - 2) x 180
where;
n = number of sides;
So,
Sum of interior angles = (10 - 2) x 180 = 1440°
The sum of interior angle of a decagon is 1440°
Answer:
680 ways
Step-by-step explanation:
17 C 3 17!/(14!3!) = 680 ways
use trig to work out answer
e.g sin = opp/hyp
sin60 = 20/hyp
change sin60 into the form of a trig ratio i.e sin 60=(√3/4)=(√3)/2
Then figure out answer as normal using trig
hope this helps...
