(a) 50° In AABC, BC = AB and 2B=80°. Then, 2A=! (b) 400 (c) 100 (d) 80- 6. In A ABC, 2C = 2A, BC = 4 cm and AC = 5

Question

(a) 50°
In AABC, BC = AB and 2B=80°. Then, 2A=!
(b) 400
(c) 100
(d) 80-
6. In A ABC, 2C = 2A, BC = 4 cm and AC = 5 cm. Then, AB = ?
[b] 5 cm
(c) 8 cm (d) 2.5 cm
Tien sides of a triangle are al length lun and 2,5 cm. The length of the
(a) tom​

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Alice 4 weeks 2021-08-16T13:56:12+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-16T13:57:12+00:00

    Answer:

    Hear is your answer ok…..

    0
    2021-08-16T13:57:56+00:00

    Answer:

    In triangle ABC, BC=AB and angle B= 80, then angle A = 50

    Solution:

    Given that in triangle ABC, BC = AB which means ABC is an isosceles triangle.

    We know the sum of angles in a triangle is 180°. Since it is an isosceles triangle the measure of two angles will be same. Let ∠A = x and ∠c = x

    We know,

    Sum of all angles = 180°

    x+x+80° = 180°

    2x= 180°-80°

    2x=100°

    x=  = 50

    Thus the measure of ∠A = 50°

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