Question

(6

7. In figure, AB is a diameter of the circle. DC is parallel to AB and angleCAB = 25°. Find angleADC.

​

Answer 1

Step-by-step explanation:

given ab is diameter

ab is parallel to dc

therefore angle adb = 155degree

Answer 2

•according to the question

the following picture is given below

∠CAB=25°(according to the question)

∠ACB=90°

we know,

∠CAB+∠ACB+∠ABC=180°(Angle Sum Property)

25°+90°+∠ABC=180°

or,115°+∠ABC=180

so,∠ABC=65°

∠ABC+∠ADC=180°

as we know that the Sum of opposite angles of cyclic quadrilateral is 180°

65°+∠ADC=180°

so,

∠ADC=115°

so the final answer is angle ADC is 115°