Question

ABCD is a rectangle with angle abd=40 determine angle dbc

Answer 1

We know that all angles in a rectangle in 90degree
angle ABD = 40. ]- 1
angle DBC = ?
angle ABD + angle DBC =90
angle DBC = 90-40. (from 1)
angle DBC = 50 degrees

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Answer 2

Given,

ABCD is a rectangle.

Angle ABD = 40°

To find,

The value of angle DBC.

Solution,

The value of angle DBC will be 50°.

We can easily solve this problem by following the given steps.

We know that in a rectangle the opposite sides are equal and all the angles are right angles (90°).

Let's draw a diagonal, BD.

According to the question,

Angle ABD = 40°

Angle ABC = 90°

Angle ABD + angle DBC = 90°

40° + angle DBC = 90°

Angle DBC = (90-40)° [Moving 40 from the left-hand side to the right-hand side results in the change of the sign from plus to minus.]

Angle DBC = 50°

Hence, the value of angle DBC is 50°.