perplexus.info :: Geometry : Measure that angle

Measure that angle (Posted on 2002-06-18)

Given that:

ABC is an isosceles triangle in which

    AB = AC

The lengths of the following segmets are equal:

    AD
    DE
    EC
    BC

Find the measure of angle A.

See The Solution Submitted by vohonam

Rating: 4.2000 (20 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re: Oh wait - I gottit!

| Comment 17 of 59 |

(In reply to Oh wait - I gottit! by Nick Reed)

>Angle AED must also be "a" (as AED is an isoceles triangle), so ADE must >be "180-2a". Therefore BDE is "2a". So, line DE must be (3a/2) from the >vertical.

sorry i dont get the

>So, line DE must be (3a/2) from the vertical.

can you explain that?

Posted by Cheradenine on 2002-06-19 00:57:20

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