Math Problem Statement

Solve for x and y in the rhombus with side lengths and angles expressed algebraically.

Solution

The image shows a rhombus with angles and side lengths represented by algebraic expressions. Here's a breakdown of how to solve for xx and yy:

1. Identifying Key Information:

  • JK = KL = LM = MJ: Since this is a rhombus, all sides are congruent. So, the expressions for side lengths are equal.

    • JK=4x+17JK = 4x + 17
    • LM=8x3LM = 8x - 3 Therefore, 4x+17=8x34x + 17 = 8x - 3.
  • Opposite Angles of a Rhombus are congruent. So:

    • J=L\angle J = \angle L
    • K=M=108\angle K = \angle M = 108^\circ

    We are given that:

    • J=(7y5)\angle J = (7y - 5)^\circ.

    The sum of the angles in a rhombus is 360360^\circ. So, using the fact that K=M=108\angle K = \angle M = 108^\circ, we can solve for yy from: 2(7y5)+2(108)=360.2(7y - 5) + 2(108) = 360.

2. Solving the Equations:

Equation for xx:

4x+17=8x34x + 17 = 8x - 3 Solve for xx: 17+3=8x4x17 + 3 = 8x - 4x 20=4x20 = 4x x=5x = 5

Equation for yy:

2(7y5)+2(108)=3602(7y - 5) + 2(108) = 360 Simplify: 14y10+216=36014y - 10 + 216 = 360 14y+206=36014y + 206 = 360 14y=36020614y = 360 - 206 14y=15414y = 154 y=11y = 11

Final Answers:

  • x=5x = 5
  • y=11y = 11

Would you like further details or explanations on any part of the solution? Here are some related questions:

  1. Why are opposite angles in a rhombus congruent?
  2. How do you derive the equation for the sum of the angles in a quadrilateral?
  3. What are the properties of a rhombus that make the sides equal?
  4. Can this method be used for other types of quadrilaterals like squares or rectangles?
  5. How would you solve the equations if given different angle measurements?

Tip: In a rhombus, diagonals bisect the angles, which can help in more complex problems involving diagonals and angles!

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Math Problem Analysis

Mathematical Concepts

Algebra
Geometry
Properties of Rhombus
Linear Equations

Formulas

Sum of angles in a quadrilateral = 360°
Congruent sides of a rhombus: JK = LM = KL = MJ
Congruent opposite angles in a rhombus: ∠J = ∠L, ∠K = ∠M

Theorems

Properties of a Rhombus
Congruent Opposite Angles
Linear Equations

Suitable Grade Level

Grades 8-10