a right triangle cannot have dash angle​

Question

a right triangle cannot have dash angle​

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Isabella 1 week 2021-10-09T01:39:20+00:00 2 Answers 0 views 0

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    0
    2021-10-09T01:40:32+00:00

    <!DOCTYPE html><html><head><style>#grad1 {height: 300px;background-color: red; /* For browsers that do not support gradients */background-image: linear-gradient(to right,blue, red,yellow,orange); /* Standard syntax (must be last)*/}</style></head><body><div id="grad1" style="text-align:center;margin:auto;color:#000000;font-size:20px;font-weight:bold">Obtuse angle</div></body></html>

    0
    2021-10-09T01:40:52+00:00

    Answer:

    a right triangle cannot have an obtuse anqle

    Step-by-step explanation:

    just visualise a right triangle in your head and try to put an angle greater than 90degree into it….. you wont be able to do it without making in a scalene triangle instead of right angled.

    now for a practical explanation,

    we know that the sum of the three angles of a triangle = 180 degree

    so let A, B and C be the three angles

    then A+B+C= 180 ——— equ (1)

    now in a right triangle one of the angles need to be 90

    so lets take that 90 degree angle as C

    then equ (1) becomes

    A+B+C = A+B+90=180

    so A+B= 180-90=90

    if A+B has to be 90 and both angles are ofcourse positive

    then there is no case where either A or B is obtuse

    so A is acute

    B is acute

    C is right angled

    so NO OBTUSE ANGLE

    hope it helps,……..

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