삼각형과 다각형 단원 종합

S.1Answer each question.

1. 1
   Can sides of $18$, $16$, and $36$ meters form a triangle? 
2. 2
   Can sides of $10$, $8$, and $10$ centimeters form a triangle? 
3. 3
   Can sides of $29$, $20$, and $6$ inches form a triangle? 
4. 4
   Can sides of $16$, $13$, and $30$ meters form a triangle? 

S.2Find each missing angle.

1. 5
   Find the missing angle. 
2. 6
   Find the missing angle. 

S.2Find each missing angle. (continued)

1. 7
   Find the missing angle. 
2. 8
   Find the missing angle. 

S.3Ticks: equal sides. Arrows: parallel sides. Squares: right angles. Names: square, rectangle, rhombus, parallelogram, trapezoid, quadrilateral.

1. 9
   All its names: 
2. 10
   All its names: 
3. 11
   All its names: 
4. 12
   All its names: 

S.4Count the sides. Use (n − 2) × 180° for the sum of the interior angles.

1. 13
   Sum of the interior angles: 
2. 14
   Sum of the interior angles: 

S.4Count the sides. Use (n − 2) × 180° for the sum of the interior angles. (continued)

1. 15
   Sum of the interior angles: 
2. 16
   Regular polygon. Each interior angle: 

S.1Triangle Inequality

1. 1no
2. 2yes
3. 3no
4. 4no

S.2Angles in Triangles

1. 5$25^{\circ }$
2. 6$23^{\circ }$
3. 7$65^{\circ }$
4. 8$59^{\circ }$

S.3Classify Quadrilaterals

1. 9parallelogram, rectangle, rhombus, square
2. 10parallelogram, rhombus
3. 11parallelogram, rectangle
4. 12trapezoid

S.4Interior Angles of Polygons

1. 13$1,080^{\circ }$
2. 14$540^{\circ }$
3. 15$360^{\circ }$
4. 16$120^{\circ }$