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In the figure at right, it is given than BDC is straight, BD = DA, and AB = AC = DC. Find the size of angle C
 one year ago
 one year ago
In the figure at right, it is given than BDC is straight, BD = DA, and AB = AC = DC. Find the size of angle C
 one year ago
 one year ago

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CopythatBest ResponseYou've already chosen the best response.1
dw:1351641146982:dw
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
do you know what an isosceles triangle is and what its properties are?
 one year ago

CopythatBest ResponseYou've already chosen the best response.1
Yeah. I figured angles B and DAB must be equal, angles CDA and CAD must be equal, and angles B and C must be equal
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
you are almost there  now assign a symbol to angle ABD  lets call it x, and fillin all the other angles you know using this symbol, e.g. from what you have already said we get: dw:1351641960334:dw now find y in terms of x and then use the property of the sum of the angles in a triangle to solve for x.
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
have you understood how to proceed?
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
HINT: Use the angle sum of a triangle in triangle CAD to express y in terms of x.
 one year ago

CopythatBest ResponseYou've already chosen the best response.1
Using triangle CAD, y = (180x)/2?
 one year ago

CopythatBest ResponseYou've already chosen the best response.1
I plugged that in for y: 180=3x+[(180x)/2] And found x=36
 one year ago

asnaseerBest ResponseYou've already chosen the best response.1
And your answer agrees with the one I got as well :)
 one year ago
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