Centroid and Orthocenter Answers

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In triangle NLM, point S is the centroid, QS = (3x – 5) cm, and NS = (4x) cm.

Question illustration
A
5 cm
B
10 cm
C
20 cm
D
30 cm
2
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If an orthocenter lies inside of a triangle, then the triangle must be

A
isosceles.
B
obtuse.
C
right.
D
acute.
3

In triangle NQL, point S is the centroid, NS = (x + 10) feet, and SR = (x + 3) feet.

Question illustration
A
4 feet
B
7 feet
C
10 feet
D
14 feet
4

In which figure is point G an orthocenter?

A
Triangle A B C is a right triangle. Lines are drawn from each point to the opposite side and intersect at point G.
Option A
B
Triangle F D E is shown. Lines are drawn from each point to the opposite side and intersect at point G. The lines cut each side into 2 equal parts.
Option B
C
Triangle L M N is shown. Lines are drawn from each point to the opposite side and intersect at point G. Each angle has a different measure.
Option C
D
Triangle H J K is shown. Lines are drawn from each point to the opposite side to form right angles and the lines intersect at point G.
Option D
5

Triangle D E F is shown. Lines are drawn from each point to the opposite side and intersect at point G. Line segments D C, E B, and F A are formed and cut each side into 2 equal parts.

Question illustration
A
5 cm
B
10 cm
C
15 cm
D
20 cm
6

Point G is the centroid of triangle ABC. AG = (5x + 4) units and GF = (3x – 1) units.

Question illustration
A
11 units
B
15 units
C
43 units
D
51 units
7

The steps shown can be used to prove that the medians of a triangle meet at a point.1. Define segments BD and CE as medians of triangle ABC.2. Write linear equations for and .3. Use a system of linear equations to solve for the coordinates of intersection point G.4. Write the equation of .5. Write an expression for the midpoint of BC, point F. 6. Show that point F lies on .7. ?

Question illustration
A
Write a linear equation for each side of the triangle.
B
Write an expression for the midpoint of AC and BC.
C
Show that AF is congruent to BD and CE.
D
Show that AF is the median of BC.
8

An orthocenter is the intersection of three

A
angle bisectors in a triangle.
B
altitudes in a triangle.
C
medians in a triangle.
D
perpendicular bisectors in a triangle.
9

In which type of triangle is the orthocenter on the perimeter of the triangle?

A
a right triangle
B
an acute triangle
C
an obtuse triangle
D
an equilateral triangle
10

In the diagram, GB = 2x + 3..

Question illustration
A
5 units
B
10 units
C
15 units
D
30 units

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