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.)

To Charadenine

| Comment 19 of 59 |

(In reply to re: Oh wait - I gottit! by Cheradenine)

What Nick is saying (I think) is that if you draw a line through D perpendicular to the base BC and call the intersection F, it will divide the angle BDE (=2a) into two angles: BDF = a/2 and FDE=3a/2.

Posted by TomM on 2002-06-19 02:49:25

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