Exploring Perpendicular and Angle Bisectors in Triangles

The video tutorial covers solving geometry problems using different methods. It starts with an introduction to using a compass and straight edge for constructing an incenter, followed by solving a straightforward problem using theorem 381. The teacher then explains a brute force method for finding a circumcenter, but suggests a more efficient approach using graph paper. Finally, a problem is solved by inspection, demonstrating the use of circumcenter in a right triangle.

What is the purpose of using a compass and straight edge in geometry?

• To calculate the area of shapes

• To construct geometric figures and find points like the incenter

• To measure angles accurately

• To draw perfect circles

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CCSS.HSG.CO.C.9

When finding the incenter of a triangle, why is it beneficial to find the intersection of all three angle bisectors?

• To ensure the triangle is equilateral

• To verify the accuracy of measurements

• To find the centroid

• To determine the perimeter of the triangle

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CCSS.HSG.C.A.3

What is Theorem 3.8.1 used for in geometry?

• To find the area of a triangle

• To set up proportions between sides of similar triangles

• To calculate the hypotenuse of a right triangle

• To determine the volume of a prism

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CCSS.HSG.SRT.B.5

In a proportion problem involving triangles, if one side of a triangle is 10 and the corresponding side in a similar triangle is 6, what is the ratio of these sides?

• 5:3

• 3:5

• 10:6

• 6:10

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CCSS.HSG.SRT.A.2

What is the first step in the brute force method to find the circumcenter of a triangle?

• Find the midpoint of one side

• Find the slope of the line containing two points

• Draw the triangle on graph paper

• Calculate the area of the triangle

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CCSS.HSG.C.A.3

Why is the brute force method considered time-consuming?

• It is only used for large triangles

• It needs advanced software

• It requires multiple calculations and steps

• It involves complex formulas

What is the equation of a line perpendicular to a horizontal line?

• y = constant

• x = constant

• y = mx + b

• x = 0

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CCSS.HSG.CO.A.1

CCSS.4.G.A.1

How do you find the midpoint of a line segment with endpoints (x1, y1) and (x2, y2)?

• ((x1 + x2)/2, (y1 + y2)/2)

• ((x1 - x2)/2, (y1 - y2)/2)

• ((x1 * x2)/2, (y1 * y2)/2)

• ((x1 / x2)/2, (y1 / y2)/2)

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CCSS.HSG.GPE.B.6

In the practical problem, what are the coordinates of the grocery stores?

• (0,0), (4,0), (0,6)

• (0,0), (4,0), (6,6)

• (0,0), (4,4), (6,0)

• (0,0), (4,6), (6,4)

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CCSS.5.G.A.2

Where should the restaurant be placed to be equidistant from the three grocery stores?

• (3,3)

• (3,2)

• (2,3)

• (2,2)

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CCSS.HSG.C.A.3