# GEOMETRY

USE RHOMBUS ABCD. FIND VALUE OF X, IF M DCB = 5X - 10 AND M DAC = X + 10.

1. 👍 0
2. 👎 0
3. 👁 56
asked by ZULAY
1. In a rhombus, opposite angles are equal, and the diagonals bisect the angles.
So if angle DAC = x+10
then angle DAB = 2x + 20

then 5x-10 = 2x+20
3x = 30
x = 10

1. 👍 0
2. 👎 0
posted by Reiny

## Similar Questions

1. ### maths

rhombus ABCD is similar to rhombus BFDE. The area of rhombus ABCD is 24,and angle BAD=60degreees.what is the area of rhombus BFDE?

asked by ramesh reddy on May 7, 2013
2. ### maths

Rhombus ABCD is similar to rhombus BFDE. The area of rhombus ABCD is 24,and angle BAD=60 degrees. What is the area of rhombus BFDE?

asked by ramesh reddy on May 17, 2013
3. ### maths

Rhombus ABCD is similar to rhombus BFDE.The area of rhombus ABCD is 24 and angle BAD=60 degrees .What is the area of rhombus BFDE?

asked by ramesh reddy on May 19, 2013
4. ### geometry

In the rhombus ABCD, AB=10 and AC=12. Find the area of the rhombus. I am confused about how to solve this problem.

asked by Anonymous on January 6, 2011
5. ### Math - Coordinate Geometry

The vertices of a quadrilateral are A(-2,3), B(5,4), C(4, -3) and D(-3, -4). Prove that ABCD is a rhombus. Find the area of ABCD. Please show working out, thanks.

asked by Anonymous on December 16, 2016
6. ### Math - Coordinate Geometry

The vertices of a quadrilateral are A(-2,3), B(5,4), C(4, -3) and D(-3, -4). Prove that ABCD is a rhombus. Find the area of ABCD. Formula to find length: d = √(x2 - x1)^2 + (y2-y1)^2 Please show working out, thanks.

asked by Anonymous on December 17, 2016
7. ### Geometry

Given: ABCD is a parallelogram;

asked by DANIELLE on June 13, 2007
8. ### math

A rhombus ABCD has AB = 10 and m∠A = 60°. Find the lengths of the diagonals of ABCD.

asked by annie on May 15, 2017
9. ### Geometry

Quadrilateral ABCD is a parallelogram. If adjacent angles are congruent, which statement must be true? A. Quadrilateral ABCD is a square. B. Quadrilateral ABCD is a rhombus. C. Quadrilateral ABCD is a rectangle. D. Quadrilateral

asked by Lauren on July 5, 2017
10. ### Geometry

Can some one please check these for me.Thanks Angle DEF is similar to Angle HJK and the scale factor of angle DEF to anle HJK IS 5/2. If EF =15 FIND JK Here is what I came up with Am I correct 5/2 = EF/JK 5/2 =15/JK 5(JK)=30

asked by DANIELLE on June 14, 2007

More Similar Questions