Answer:
IMPORTANT- Triangle Sums up to 180.
Step-by-step explanation: According to the symbol, both sides are congruent. Which means they have the same degrees (Also known as an isosceles triangle). Since the left side of the angle measures 58.5 degrees, the right side angle is also 58.5. Sum up both sides --->
= 58.5+58.5 = 117
*every triangle sum to 180*
= Whole triangle degrees Subtract ( - ) to 117 = 180-117 = 63
So subtracting the whole triangle measure (180*) to 117 ( 117 is the degrees of both sides together) is 63. So "x" is equal to 63 degrees.
Answer: "x" equals 63 degrees.
For Double checking:
Turn "x" into 63 and add all the sides measures and check if it sum's up to 180 (which is the measure of the whole triangle.)
Numerical Setup for double-checking :
58.5+ 58.5 +X(63) =180
58.5 +58.5 +63 = 180