Well in a right angle triangle, we know that angle C would be 90 degrees, we can check this by solving for X and seeing if the expression 2x will give us a value of 90 degrees.
So 2x = 90
X = 90/2
X = 45 degrees.
90 = 2x
90 = 2(45)
90 = 90.
Thus since the equation is true, X = 45 degrees, we can also solve for the remaining angles knowing what X is.
Answer:
23. 216
24. 56
25. 52
for 26, 27 i'll try to calculate the answer, sorry
Answer:
5. Commutative Property of Addition
Your first steps are correct. Mult. the given fraction by (1+sqrt(5)) / (1+sqrt(5)).
Result: 8(1 + sqrt(5) ) 8(1 + sqrt(5) )
------------------- = ----------------------
1 - 5 -4
Must keep that denominator (-4).
