We are asked to find the value of $y$ in the figure. The polygon has angles $4y$, $4y$, $5y$, $2y$, and $3y$.

GeometryPolygonInterior AnglesAngle Sum Formula
2025/7/16

1. Problem Description

We are asked to find the value of yy in the figure. The polygon has angles 4y4y, 4y4y, 5y5y, 2y2y, and 3y3y.

2. Solution Steps

The sum of interior angles of a polygon with nn sides is given by (n2)×180(n-2) \times 180^{\circ}.
In this case, the polygon has 5 sides, so the sum of the interior angles is (52)×180=3×180=540(5-2) \times 180^{\circ} = 3 \times 180^{\circ} = 540^{\circ}.
Therefore, 4y+4y+5y+2y+3y=5404y + 4y + 5y + 2y + 3y = 540^{\circ}.
Combining the terms, we get 18y=54018y = 540^{\circ}.
Dividing both sides by 18, we get y=54018=30y = \frac{540^{\circ}}{18} = 30^{\circ}.

3. Final Answer

E. 30°

Related problems in "Geometry"

We are given that $\overline{EJ} \parallel \overline{FK}$, $\overline{JG} \parallel \overline{KH}$, ...

GeometryTriangle CongruenceParallel LinesASA Congruence PostulateProofs
2025/7/16

The image shows a circle divided into sectors. We are given the degree measures of three sectors: $7...

CircleAnglesSectorCentral Angle
2025/7/16

We have a quadrilateral $ABCD$. Angle $B$ and angle $D$ are right angles. $AB = 10M$. Angle $BAC$ is...

QuadrilateralsTrianglesRight TrianglesIsosceles TrianglesTrigonometryPythagorean TheoremAngle Properties
2025/7/16

We are given a diagram with two lines and angles labeled $x$, $y$, and $z$. The line segment $PQ$ is...

Parallel LinesAnglesTriangle Angle Sum TheoremGeometric Proof
2025/7/16

The problem provides a diagram with lines and angles marked as $x$, $y$, and $z$. The line $PQ$ is p...

Parallel LinesAnglesTransversalsTriangle Angle SumGeometric Proof
2025/7/16

Determine the relationship between angles $x$ and $y$ in the given diagram, where the lines $PQ$ and...

Parallel LinesAnglesAlternate Interior AnglesStraight LinesGeometric Proof
2025/7/16

We are given a diagram with parallel lines and a triangle. We are asked to find the relationship bet...

Parallel LinesTrianglesAngle RelationshipsEuclidean Geometry
2025/7/16

We are given a diagram with two lines that appear parallel (based on the arrowhead on line $PQ$ and ...

Parallel LinesTransversalsAnglesTriangle Angle Sum TheoremExterior Angles
2025/7/16

The image shows two parallel lines, $PQ$ and $RS$, intersected by a transversal line. There is also ...

Parallel LinesTransversalTrianglesAngle RelationshipsAlternate Interior AnglesCorresponding AnglesAngle Sum Property
2025/7/16

We are given a diagram with two lines. The first line is labeled as $P$ on the left and has an arrow...

Parallel LinesTransversalAnglesTriangle PropertiesExterior Angle Theorem
2025/7/16