Perpendicular Bisectors and Circumcenter

This video tutorial covers the construction of perpendicular bisectors of a triangle's sides. It explains the properties of these bisectors, including their role in forming right angles and dividing sides into congruent segments. The tutorial introduces the circumcenter, the point where all bisectors intersect, and its significance as the center of a circumscribed circle. The video provides a detailed construction process using a compass and straightedge, ensuring the radius is more than half the longest side. The tutorial concludes by verifying the construction and the circumcenter's position.

What is the primary characteristic of a perpendicular bisector in a triangle?

• It forms a right angle with the side it bisects.

• It is parallel to one side of the triangle.

• It is the longest side of the triangle.

• It divides the triangle into two equal areas.

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CCSS.HSG.C.A.3

What is the circumcenter of a triangle?

• The midpoint of the longest side.

• The point where the perpendicular bisectors intersect.

• The center of the inscribed circle.

• The point where the medians intersect.

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CCSS.HSG.CO.C.9

What tool is essential for constructing a perpendicular bisector?

• Calculator

• Compass

• Ruler

• Protractor

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CCSS.HSG.CO.C.9

When constructing a perpendicular bisector, what must be true about the compass radius?

• It must be more than half the length of the longest side.

• It must be exactly equal to the side length.

• It must be adjustable during the construction.

• It must be less than half the length of the side.

What is the result of bisecting a side of a triangle?

• The side is extended to form a new triangle.

• The side is divided into two congruent segments.

• The side is divided into two unequal segments.

• The side is rotated around the circumcenter.

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CCSS.HSG.CO.B.6

What is the significance of the intersection points of arcs in the construction process?

• They are the points through which the bisector passes.

• They are irrelevant to the construction.

• They determine the length of the bisector.

• They are the endpoints of the bisector.

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CCSS.HSG.C.A.3

What is the final step in constructing the perpendicular bisectors of a triangle?

• Measuring the angles of the triangle.

• Calculating the area of the triangle.

• Drawing a circle through the vertices.

• Identifying the circumcenter.

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CCSS.HSG.C.A.3

What geometric shape is formed by the circumcenter and the vertices of the triangle?

• A square

• A rectangle

• A circle

• A hexagon

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CCSS.HSG.C.A.3

What is the relationship between the circumcenter and the vertices of the triangle?

• The circumcenter is inside the triangle.

• The circumcenter is closer to one vertex than the others.

• The circumcenter is equidistant from the vertices.

• The circumcenter is outside the triangle.

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CCSS.HSG.C.A.3

What does it mean for a circle to circumscribe a triangle?

• The circle is inside the triangle.

• The circle passes through the midpoints of the sides.

• The circle passes through the vertices of the triangle.

• The circle is tangent to one side of the triangle.