Triangle Angle Bisector Theorem

Front

What is the Triangle Angle Bisector Theorem?

Back

The Triangle Angle Bisector Theorem states that the angle bisector of an angle in a triangle divides the opposite side into two segments that are proportional to the lengths of the other two sides.

Tags

CCSS.HSG.CO.C.9

Front

If a triangle has sides of lengths 8 and 6, and the angle bisector divides the opposite side into segments of lengths x and y, what is the relationship between x and y?

Back

x/y = 8/6 or x/y = 4/3.

Tags

CCSS.HSG.CO.C.9

Front

What is the formula to find the length of the angle bisector in a triangle?

Back

The length of the angle bisector can be calculated using the formula: l = (2ab)/(a+b) * cos(C/2), where a and b are the lengths of the sides adjacent to the angle, and C is the angle.

Tags

CCSS.HSG.CO.C.9

Front

In triangle ABC, if AB = 10, AC = 6, and the angle bisector of angle A intersects BC at D, what is the ratio BD:DC?

Back

BD:DC = AB:AC = 10:6 or 5:3.

Tags

CCSS.HSG.CO.C.9

Front

What is the significance of the angle bisector in triangle geometry?

Back

The angle bisector helps in determining the proportional lengths of the sides opposite the angles, which is crucial for solving various geometric problems.

Tags

CCSS.HSG.C.A.3

Front

If the angle bisector divides the opposite side into segments of 5 and 3, what are the lengths of the other two sides?

Back

The lengths of the other two sides can be found using the ratio 5:3, which corresponds to the lengths of the sides adjacent to the angle.

Tags

CCSS.HSG.CO.C.9

Front

How can the Triangle Angle Bisector Theorem be applied in real-life situations?

Back

It can be used in fields such as architecture and engineering to ensure structures are built with precise angles and proportions.

Tags

CCSS.HSG.CO.C.9

Front

What is the relationship between the angle bisector and the incenter of a triangle?

Back

The angle bisectors of a triangle intersect at a point called the incenter, which is the center of the circle inscribed within the triangle.

Tags

CCSS.HSG.C.A.3

Front

If the lengths of the sides of a triangle are 12, 16, and 20, what is the length of the angle bisector from the vertex opposite the side of length 20?

Back

Using the angle bisector length formula, the length can be calculated as approximately 12.65.

Tags

CCSS.HSG.CO.C.9

Front

What is the converse of the Triangle Angle Bisector Theorem?

Back

The converse states that if a point D on side BC of triangle ABC divides BC into segments BD and DC such that BD/DC = AB/AC, then AD is the angle bisector of angle A.

Tags

CCSS.HSG.CO.C.9