Practice with the help of Spectrum Math Grade 5 Answer Key Chapter 9 Posttest regularly and improve your accuracy in solving questions.

Check What You Learned

Question 1.

Identify the following polygons. Write the number that refers to the correct figure.

Question 2.
parallelogram ______________
Parallelogram – A quadrilateral with both sets of opposites sides parallel.
In the above polygons, figure 2 represents the parallelogram.

Question 3.
pentagon ______________
Pentagon – A polygon with 5 sides
In the above polygons, figure 1 represents the pentagon.

Question 4.
hexagon ______________
Hexagon – A polygon with 6 sides
In the above polygons, figure 3 represents the hexagon.

Fill in the blanks to complete the hierarchy diagram.

Question 5.

Polygon – A closed plane figure formed from line segments that meet only at their endpoints.
Quadrilateral – A four sided polygon.
Trapezoid – A quadrilateral with exactly one pair of parallel sides.
Parallelogram – A quadrilateral with both sets of opposites sides parallel.
Rectangle – A quadrilateral with two pairs of equal parallel sides and four right angles.
Square – A parallelogram with four equal sides and four right angles.
Rhombus – A parallelogram with all four sides equal in length.

Use a protractor to measure each angle. Then, label each angle right, acute, or obtuse.

Question 6.
a.

The type of angle in the above figure is right angle.
A right angle measures exactly 90°.

b.

The type of angle in the above figure is obtuse angle.
An obtuse angle measures greater than 90° but less than 180°.

Question 7.
a.

The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.

b.

The type of angle in the above figure is obtuse angle.
An obtuse angle measures greater than 90° but less than 180°.

Use the circle to answer the questions.

Question 8.
Name the circle.
The origin of a circle is a point inside the circle that is the same distance from any point on the circle. A circle is named by its origin.
In the above figure, Name the circle : S

Question 9.
Name the origin of the circle.
The origin of a circle is a point inside the circle that is the same distance from any point on the circle.
In the above figure, Name the origin : S

Question 10.
Answer:  $$\overline{ST}$$, $$\overline{RS}$$ or $$\overline{SV}$$
A radius of a circle is a line segment with one endpoint at the circle.
In the above figure, Name the radius : $$\overline{ST}$$, $$\overline{RS}$$ or $$\overline{SV}$$

Question 11.
Name a diameter.
Answer: $$\overline{RV}$$
A diameter is a chord that passes through the origin of the circle.
In the above figure, Name the diameter : $$\overline{RV}$$

Question 12.
Name a chord that is not a diameter.
Answer: $$\overline{VW}$$
A chord is a line segment with both endpoints on the circle.
In the above figure, Name the chord that is not a diameter : $$\overline{VW}$$

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