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  1. #1
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    Please Hurry. 3 Geometry Problems. I have Test Tomorrow. Hurry Please

    Hi I am in a hurry. I am in 9th Grade Geometry Honors and need help with 3 problems. Please hurry. I have a test tomorrow. I have quickly drew the probs 2 and 3 in paint, (sorry for lack of qualilty, i'm trying to study!)

    1. The Measures of two angles of a triangle are in the ratio 2:3. If the third angle is 4 degrees larger than the larger of the other two angles, find the measures of an exterior angle at the third vertex.

    2.


    3.




    Thanks.
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  2. #2
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    Ok thanks, I am going to flunk the test. Thanks a lot.
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  3. #3
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    For question 3, you need exactly 3 points in order to "determine" a plane. What you need to figure out is how many trios of the 5 vertices can you form without repetition. i.e., ABC = BCA = ACB = etc.

    For question 1, what you have is x, 3x/2, and 3x/2+4. So x+3x/2+3x/2+4=180. x being the smallest of all angles. Solve for x, use it to find the largest of angles, and then subtract it from 360.

    For question 2, I don't understand your drawing...
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by AirForceOne
    Hi I am in a hurry. I am in 9th Grade Geometry Honors and need help with 3 problems. Please hurry. I have a test tomorrow. I have quickly drew the probs 2 and 3 in paint, (sorry for lack of qualilty, i'm trying to study!)
    2.
    2.a If AD is perpendicular to m then angle ADC= angle ADE = 90 degrees.
    But angle ADC=x+88, and angle ADE=74-8x, so both cannot be 90 degrees.
    Therefore AD is not perpendicular to m.

    To do the remaining parts there is insufficient information, but lets assume
    you intend that D lies on segment AB.

    Then angles ADE and BDE are supplementary - that is they sum to
    180 degrees. So:

    74 - 8x + 2x +94 =180,

    or:

    x = -2.

    2.b No segments AD and CD are not perpendicular, as angle ADC=86 degrees.

    2.c Yes segments AD and DE are perpendicular as angle ADE=90 degrees.

    RonL
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  5. #5
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    Thanks, read the replies yesterday night
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