I an isosceles triangle find it’s angle if it’s base angle is 70 °

Question

I an isosceles triangle find it’s angle if it’s base angle is 70 °

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Claire 1 month 2021-08-23T00:58:36+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-23T01:00:05+00:00

    Answer:

    the angles are 40°, 70° and 70°

    Step-by-step explanation:

    Given that angle C=70°

    In an isosceles ∆ ABC , AB=AC

    .: angle B = angle C

    angle B = 70°

    Now, again in ∆ ABC, by angle sum property,

    angle A + angle B + angle C =180°

    angle A + 70° +70° =180°

    angle A = 180°-70°-70°

    .: angle A = 40°

    Here is your answer.

    Hope it helps you…….

    Gn

    0
    2021-08-23T01:00:35+00:00

    Answer:

    In triangle ABC

    let,

    angle A be x

    angle B be y

    angle C be z

    In an isosceles triangle 2 sides are equal.

    therefore,

    AB = AC…. 2 sides of isosceles triangle are equal

    y = 70 ° …… given

    y = z = 70°…..base angles are equal (AB = AC)

    therefore,

    x + y + z = 180° …. sum of all angles of a triangle is 180°

    x + 70 + 70 = 180

    x = 180 – 140

    x = 40°

    therefore,

    angle A = x = 40°

    angle B = y = 70°

    angle C = z = 70°

    hope my answer will help you.

    pls do press the thanks button and do comment

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