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10.4.0: Exercises

  • Page ID
    171795
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    In the following exercises, identify the polygons.

    Exercise \(\PageIndex{1}\)

    A hexagon.

    Exercise \(\PageIndex{2}\)

    A trapezoid.

    Exercise \(\PageIndex{3}\)

    A parallelogram.

    Exercise \(\PageIndex{4}\)

    Find the perimeter of a regular hexagon with side length equal to 12 cm.

    Exercise \(\PageIndex{5}\)

    A regular quadrilateral has a perimeter equal to 72 in. Find the length of each side.

    Exercise \(\PageIndex{6}\)

    The perimeter of an equilateral triangle is 72 cm. Find the length of each side.

    Exercise \(\PageIndex{7}\)

    Find the dimensions of a rectangular region with perimeter of 34 m, where the shorter side is 13 less than twice the longer side. Let \(x = \text{the longer side}\). Then, the shorter side is \((2x - 13).\)

    Exercise \(\PageIndex{8}\)

    Find the perimeter of the figure shown.

    A parallelogram, w x y z. The sides, w z and w x measure 10 meters and 4 meters. The angles, x and y measure 130 degrees and 50 degrees.

    Exercise \(\PageIndex{9}\)

    Find the perimeter of a fenced-in area where the length is 22 m, and the width is ½ of the length plus 3.

    Exercise \(\PageIndex{10}\)

    You have 140 ft of fencing to enclose a rectangular region that borders a river. You do not have to fence in the side that borders the river. The width is equal to \(2a\), and the length is equal to six times the width less 10. Find the dimensions of the region to be fenced.

    A fence has borders on three sides. The fourth side bordering a river does not have a fence. The left and right sides measure 2 a. The bottom side measures 6 a minus 10.

    Exercise \(\PageIndex{11}\)

    What is the measure of each interior angle of a regular hexagon?

    Exercise \(\PageIndex{12}\)

    What is the sum of the interior angles of a triangle?

    Exercise \(\PageIndex{13}\)

    Use algebra to find the measure of each angle of the quadrilateral shown.

    A quadrilateral, A B C D. The angles, A, B, C, and D measure (2 x minus 15) degrees, (5 x) degrees, (2 x plus 10) degrees, and (6 x plus 5) degrees.

    Exercise \(\PageIndex{14}\)

    Find the missing sides and angles of the parallelogram shown.

    A parallelogram, w x y z. The sides, w z and w x measure 10 meters and 4 meters. The angles, x and y measure 130 degrees and 50 degrees.

    Exercise \(\PageIndex{15}\)

    Find the sum of the interior and exterior angles of the regular pentagon shown.

    A pentagon, A B C D E. The exterior angles are marked at each vertex.

    Exercise \(\PageIndex{16}\)

    What is the measure of each exterior angle of a regular hexagon?

    Exercise \(\PageIndex{17}\)

    What is the sum of the exterior angles of a triangle?

    Exercise \(\PageIndex{18}\)

    What is the sum of the exterior angles of an octagon?

    Exercise \(\PageIndex{19}\)

    Find the circumference of a circle with radius 5.

    Exercise \(\PageIndex{20}\)

    Find the circumference of a circle with a diameter of 7.

    Exercise \(\PageIndex{21}\)

    Find the perimeter of the window in the figure shown.

    A polygon shows a semicircle resting on top of a rectangle. The length and width of the rectangle measure 5 feet and 10 feet.

    Exercise \(\PageIndex{22}\)

    Find the circumference of a circle with a radius of 1.25 cm.

    Exercise \(\PageIndex{23}\)

    The hands of a clock vary in length. If the hour hand is 5 inches long and the minute hand is 7 inches long, how far does each hand travel in 12 hours?

    An analog clock with the hour hand pointing to 4 and the minute hand pointing to 12.

    Exercise \(\PageIndex{24}\)

    A bicycle tire has a radius of 12 in. How many revolutions will the tire make if the bicycle travels approximately 377 ft?

    A bicycle tire.

    Exercise \(\PageIndex{25}\)

    When Chicago installed its Centennial Ferris wheel at Navy Pier in 1995, there was much discussion about how big it could be. The city wanted it to be as high as possible because the incredible views of the city would surely draw the tourists. It was decided that the height of the wheel could safely reach 150 ft. If the wheel begins 10 ft above ground level, what is the circumference of the Ferris wheel?

    Exercise \(\PageIndex{26}\)

    Find the perimeter of an equilateral triangle with side length equal to 21 cm.

    Exercise \(\PageIndex{27}\)

    What is the diameter of a circle whose circumference is 39.6 cm?


    10.4.0: Exercises is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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