Math Problem Statement

Solve for x in the given geometry problems: 1. Adjacent angles (x + 35)° and (2x - 5)° form a straight line. 2. Vertical angles: one is 138° and the other is (5x + 13)°. 3. Right triangle: one angle is (2x + 3)° and another is x°.

Solution

Let's solve the questions step by step.


a) Solving for xx in the angle equation:

  • Given: Two adjacent angles, (x+35)(x + 35)^\circ and (2x5)(2x - 5)^\circ, form a straight line.
  • The sum of angles on a straight line equals 180180^\circ.

(x+35)+(2x5)=180(x + 35) + (2x - 5) = 180

Combine like terms:

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Math Problem Analysis

Mathematical Concepts

Geometry
Linear Equations
Angle Relationships
Triangles

Formulas

Sum of angles on a straight line = 180°
Vertical angles are equal
Sum of angles in a triangle = 180°

Theorems

Angle Sum Property of a Straight Line
Vertical Angles Theorem
Triangle Angle Sum Theorem

Suitable Grade Level

Grades 8-10