Posted by **Tom** on Sunday, October 14, 2012 at 12:23pm.

ÚABC ~= ÚACB

BD perpendicular AC

The sum fo the three angles in any triangle is 180 degree.

Prove: mÚCBD = 1/2 mÚBAC

- Math -
**Tom**, Sunday, October 14, 2012 at 12:33pm
angle ABC ~= angle ACB

BD perpendicular AC

The sum fo the three angles in any triangle is 180 degree.

Prove: mangle CBD = 1/2 mangle BAC

- Math -
**Reiny**, Sunday, October 14, 2012 at 12:51pm
let angle CBD = a

in trianagle ABC:

2x + y = 180

in triangle BCD

a + x = 90 or 2a + 2x = 180

then 2a + 2x = 2x + y , both equal to 180

2a = y

a = (1/2y

or

angle CBD = (1/2) angle BAC

## Answer This Question

## Related Questions

- math - The Third angle of a Isosceles triangle is 16 degree less than the sum of...
- Maths Triangles - Prove that the sum of the angles of Triangle is 180°.
- ALGEBRA 1 - If x and 3x-10 represent the measure of the acute angles of a right ...
- corollary to isosceles triangle theorem - how to prove 1)the measure of each ...
- math - The sum of the measures of the angles of any triangle is 180 degrees. In...
- Angles,Lines and Triangles - The sum of two angles of a triangle is 116 degree ...
- Geometry help? - I'm not sure what to do on these questions. The measure of the ...
- MATHH - In a triangle ABC, angle A is 2 times angles C and angle B is 20 degrees...
- Geometry - If /BC bisects ÚABD, and ÚABC = 5x + 11, ÚCBD = 10x − 4, ...
- geometry - prove that The sum of the angles in any triangle is 180 degrees is ...

More Related Questions