4.
Find the values of the unknowns in each of the
following square.
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answer:
a37°
b = 127°
explanation:
in triangle DEC
Angle EDC = 180° - (82°+ 45°) = 53°
(ANGLE DCA =45° BCOZ ITS A SQUARE AND DIAGONALS BISECT ITS ANGLES)
a + angle EDC = ANGLE D = 90° ( ITS A SQUARE)
a = 90 - 53 = 37°
simply in triangle DAF,
angke DFA = 180° - ( a + A)
= 180 -( 37+90)
= 53°
b + angle DFA =180 ( SINCE ADJACENT ANGELS ARE SUPPLEMENTARY)
b = 127°
~Riya
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