Question

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Answer 1

Answer:

Circle

Given:

A,B,C and D are the poles erected on the circumference of circular park.

∠°  and ∠°.

To find:

Value of ∠ABC

Explanation:

Cyclic Quadrilateral: It is a quadrilateral which is inscribed in a circle, which means there is a circle that passes through all four vertices of the quadrilateral. It has several properties such as:

All vertices of quadrilateral lie on the circumference of the circle.

The sum of pair of opposite angles are 180°.

The measure of an exterior angle at a vertex is equal to the opposite interior angle.

According to this question,

the figure associated with  this is  attached,

ABCD will form Cyclic Quadrilateral,

and ∠A is opposite to ∠C

and ∠B is opposite to ∠D.

So, according to property of cyclic quadrilateral,

∠B + ∠D= 180°

∠B °°

∠B =°

So, ∠ABC = 100°

v

Step-by-step explanation:

Answer 2

Answer:

Incomplete question

Step-by-step explanation: