in a ABC. AB -63 cm AC-12 cm.BC-Gam. Find measure of angle A (A) 30 (B) 60 (0 90 ( DS​

Question

in a ABC. AB -63 cm AC-12 cm.BC-Gam. Find measure of angle A
(A) 30 (B) 60 (0 90 (
DS​

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Anna 2 weeks 2021-09-14T06:37:32+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-14T06:38:46+00:00

    Answer:

    angle a is 90 degree ok mark as brainlist

    0
    2021-09-14T06:38:56+00:00

    Answer:

    GIVEN: A right triangle ABC. D bisects AC. AD= DC & BD = 4.5cm

    TO FIND: the length of AC.

    CONSTRUCTION: Extend BD up to P, such that BD = DP = 4.5cm. Join AP & CP.

    Since in quadrilateral ABCP, diagonals bisect each other. So, ABCP is a parallelogram.

    But angle B = 90°

    So, parallelogram ABCP should be a rectangle.

    Therefore, diagonals AC = BP ( diagonals of a rectangle are equal)

    But BP = 4.5+4.5 = 9cm

    So, AC = 9cm.

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