8th Math 2021 STAAR Review - DAY 5

The side lengths in yards of a triangle and a square are shown in the diagram.

The perimeter of the triangle is equal to the perimeter of the square. What is the value of x?

• -4

• 2/3

• 6

• 5/2

Tags

CCSS.3.MD.D.8

In each diagram, line g is parallel to line k, and line t intersects lines g and k.

Based on the diagrams, which statement about x is true?

• The value of x is 180, because the labeled angles in each diagram are supplementary and the sum of the measures of supplementary angles is 180 degrees.

• The value of x is 90, because the labeled angles in each diagram are complementary and the sum of the measures of complementary angles is 90 degrees.

• The value of x is 44, because the sum of the measures of the labeled angles in each diagram is 180 degrees.

• The value of x is 136, because the labeled angles in each diagram are congruent.

Tags

CCSS.7.G.B.5

A survey of customers at a restaurant revealed that 7 out of 10 customers preferred the restaurant’s new spaghetti sauce. Which graph shows the relationship between y, the number of customers who preferred the new spaghetti sauce, and x, the total number of customers?

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Tags

CCSS.8.EE.B.5

A figure was transformed on a coordinate grid using the rule (x, y) ----- (-x, -y) . Which of the following describes this transformation?

• A reflection across the x-axis

• A reflection across the y-axis

• A 90° clockwise rotation about the origin

• A 180° clockwise rotation about the origin

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The scatterplot shows the low temperature and high temperature each day for a two-week period of time.

Based on the scatterplot, which is the best prediction of the high temperature in degrees Fahrenheit on a day when the low temperature is 71 °F?

• 92 °F

• 101 °F

• 88 °F

• 100 °F

Triangle ABC and triangle DEF are similar.

Which proportion must be true?

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Tags

CCSS.HSG.SRT.A.2

A math teacher observed that as the number of hours students studied their multiplication facts increased, the number of errors the students made on their multiplication tests decreased.

Which scatterplot could support this teacher’s observation?

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Tags

CCSS.8.SP.A.1

Rectangle ABCD is shown with the dimensions given in units.

The length of AB is greater than the length of AD.

Which inequality represents this situation?

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Tags

CCSS.HSG.CO.C.11

The coordinate grid shows XY.

What is the measurement of length XY in units?

The diagram represents a ramp in the shape of a right triangle and the lengths of two of its sides in feet. What is the length of the ramp in feet?

Tags

CCSS.8.G.B.7