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Anonymous asked in Education & ReferenceHomework Help · 1 decade ago

Help with math hw?

name 2 pairs of opposite rays.

name 2 straight angles each of which has its vertex at E.

name 2 angles whose sum is <ABC

figure here:

http://www.crunchyroll.com/user/babiixjen_x3/photo...

Update:

huh?what do you mean

5 Answers

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  • 1 decade ago
    Favorite Answer

    Rays make up angles. Opposite rays are two rays with a common endpoint that point in opposite directions and form a straight line. For example, Ray EA and Ray EC are opposite rays because they share an endpoing (E) and go in opposite directions. Can you find the other pair?

    Straight angles are just straight lines. Angle AEC is a straight angle because it is a straight line. Do you see the other one?

    Lastly, look at angle ABC. Do you see how it is made of two angles. One of them is angle ABE. What angle makes the other part? Together they make angle ABC.

    I hope this helps you get started and that you understand it! If not, let me know.

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  • 1 decade ago

    ahay, intawn...

    opposite rays are rays with a common endpoint/vertex that form a line

    Ans: ray EC and ray EA; ray EB and ray ED

    straight angles, on the other hand, are angles which measure 180 degrees. now since you have the condition that both angles have to have their vertex at E, the answers are:

    *angle AEC and angle BED

    since in a parallelogram, opposite angles always have equal measures, the last answer is:

    *angle ADE/ADB (they both measure the same) and angle EDC/ BDC

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  • Anonymous
    1 decade ago

    40

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  • 1 decade ago

    2 angles whose sum is <ABC are.... <ABD and <DBC

    Do you see that?

    _____________________________

    This is what is meant by straight angles

    ( http://www.mathsisfun.com/geometry/straight-angle.... )

    A straight angle is 180 degrees... so there are two straight angles that each have its vertex at E... they are... <AEC and <DEB.... Do you see that?

    ______________________

    Opposite rays are two lines that share a common endpoint, and the two lines form a line...

    Opposite rays are either 1) EA and EC.... or 2) EB and ED

    Set 1).... EA and EC both share the same common endpoint E... and when you put EA and EC end to end, they form a straight line AC...

    Set 2)... EB and ED both share the same common endpoint E... and when you put EB and ED end to end, they form a straight line BD

    http://www.mathopenref.com/oppositerays.html

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  • 1 decade ago

    1. ED and EB

    EA and EC

    are pairs of opposite rays

    2. DEC and AEB

    3. ABD and CBD

    Source(s): Solid Concepts
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