Math Problem Statement

Find the values of angles f, g, h, and k in the given rectangle where g = 110 degrees, and the diagonals intersect at the center.

Solution

This is a geometry problem involving angles in a rectangle with diagonals drawn. Let's break it down:

Given Information:

  1. The rectangle has diagonals crossing at the center.
  2. g=110g = 110^\circ (angle formed by diagonals).
  3. The rectangle divides into smaller angles labeled f,h,kf, h, k, each near a corner.

Key Properties:

  • The diagonals of a rectangle bisect each other and the opposite angles.
  • Angles formed by the diagonals add up to 180180^\circ for adjacent angles at the crossing.

Solving:

  1. g=110g = 110^\circ: This is given.
  2. hh: Since hh and gg are supplementary (angles on a straight line), h=180110=70h = 180^\circ - 110^\circ = 70^\circ.
  3. ff: This is one of the smaller angles split by the diagonals. Since the diagonals bisect the corner angle of the rectangle (9090^\circ): f=902=45.f = \frac{90^\circ}{2} = 45^\circ.
  4. kk: By symmetry, kk also equals 4545^\circ (opposite corners have equal angles in a rectangle).

Final Answers:

  • f=45f = 45^\circ
  • g=110g = 110^\circ (given)
  • h=70h = 70^\circ
  • k=45k = 45^\circ

Would you like further clarification on any step?


Related Questions:

  1. Why are the diagonals of a rectangle always congruent?
  2. What would change if this was a rhombus instead of a rectangle?
  3. How can this concept apply to solving parallelogram problems?
  4. How do you calculate angles in polygons formed by diagonals?
  5. What are supplementary and complementary angles, and how are they used here?

Tip: When solving geometry problems, always look for properties like symmetry, bisectors, or relationships between angles.

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Math Problem Analysis

Mathematical Concepts

Geometry
Properties of rectangles
Supplementary angles
Diagonal bisectors

Formulas

Angles formed by intersecting lines are supplementary: a + b = 180 degrees
The diagonals of a rectangle bisect the angles they intersect: 90 degrees divided into two equal angles

Theorems

Properties of rectangles: Opposite sides are equal, and all angles are 90 degrees.
Diagonal bisector theorem: Diagonals of a rectangle bisect each other.

Suitable Grade Level

Grades 6-8