Math Problem Statement

Solve for x and find the unknown angles in the geometric and algebraic problems shown.

Solution

Let's analyze the problem step by step based on the image you've uploaded:

1) Top Right: Vertical Angles

  • Given: Two intersecting lines forming vertical angles.
  • The note states "vertical angles are" and implies that vertical angles are congruent. Therefore, the two opposite angles should be equal.
  • One angle is given as 150°.
  • Since vertical angles are congruent, the opposite angle will also be 150°.

2) Top Left: Vertical Angle Diagram with Algebra

  • Two angles are shown:

    • One labeled 4040^\circ
    • The opposite angle (due to vertical angle property) will also be 4040^\circ.
    • Another unlabeled angle (likely complementary to 40°).

    If you're expected to find the remaining angles, the other pair of angles must add up to 180° because the two angles form a straight line (linear pair). Therefore: 18040=140180^\circ - 40^\circ = 140^\circ Hence, the other two vertical angles would both be 140°.

3) Bottom Right: Review, Solve for xx

  • Given:

    • 3x+43x + 4
    • 7x+17x + 1

    Since these angles form a straight line, they must add up to 180°. Set up the equation: (3x+4)+(7x+1)=180(3x + 4) + (7x + 1) = 180 Simplify: 10x+5=18010x + 5 = 180 Subtract 5 from both sides: 10x=17510x = 175 Divide by 10: x=17.5x = 17.5 So, the value of xx is 17.5.

4) Middle Problem: Line Segment (AB + BC = AC)

  • Given:

    • AB=5x+1AB = 5x + 1
    • BC=14BC = 14
    • AC=7x+1AC = 7x + 1

    Since AC=AB+BCAC = AB + BC, the equation becomes: (5x+1)+14=7x+1(5x + 1) + 14 = 7x + 1 Simplify the left-hand side: 5x+15=7x+15x + 15 = 7x + 1 Subtract 5x5x from both sides: 15=2x+115 = 2x + 1 Subtract 1 from both sides: 14=2x14 = 2x Divide by 2: x=7x = 7 So, the value of xx is 7.

5) Bottom Left: Angles in Triangle

  • Given:

    • mAXC=130m \angle AXC = 130^\circ
    • mBXC=(2x)m \angle BXC = (2x)^\circ

    Since the angles form a straight line, we know: 130+2x=180130^\circ + 2x = 180^\circ Solve for xx: 2x=180130=502x = 180^\circ - 130^\circ = 50^\circ Divide by 2: x=25x = 25^\circ So, the value of xx is 25°.


Would you like further details or explanations on any of these?

Here are some related questions for deeper understanding:

  1. What are some properties of vertical angles?
  2. How can linear pairs help solve for unknown angles?
  3. How do you solve an equation involving segments and algebra?
  4. What is the relationship between angles on a straight line?
  5. How can geometry help in solving algebraic expressions involving angles?

Tip: Always look for congruent or supplementary angle relationships to help with unknowns!

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Math Problem Analysis

Mathematical Concepts

Geometry
Algebra
Linear Pairs
Vertical Angles

Formulas

Sum of angles on a straight line = 180°
Vertical angles are congruent
AB + BC = AC

Theorems

Vertical Angle Theorem
Linear Pair Theorem

Suitable Grade Level

Grades 7-10