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six.5 Indirect Evidence and you will Inequalities in one single Triangle

## 6.step 3 Medians and Altitudes out of Triangles

Share with if the orthocenter of one’s triangle on the considering vertices try in to the, into the, otherwise outside the triangle. After that get the coordinates of your own orthocenter.

Explanation: The slope of the line HJ = $$\frac < 1> < 3>$$ = $$\frac < 5> < 2>$$ The slope of the perpendicular line = $$\frac < -2> < 5>$$ The perpendicular line is (y – 6) = $$\frac < -2> < 5>$$(x – 1) 5(y – 6) = -2(x – 1) 5y – 30 = -2x + 2 2x + 5y – 32 = 0 – (i) The slope of GJ = $$\frac < 1> < 3>$$ = $$\frac < -5> < 2>$$ The slope of the perpendicular line = $$\frac < 2> < 5>$$ The equation of perpendicular line (y – 6) = $$\frac < 2> < 5>$$(x – 5) 5(y – 6) = 2(x – 5) 5y – 30 = 2x – 10 2x – 5y + 20 = 0 – (ii) Equate both equations 2x + 5y – 32 = 2x – 5y + 20 10y = 52 y = 5.2 Substitute y = 5.2 in (i) 2x + 5(5.2) – 32 = 0 2x + 26 – 32 = 0 2x = 6 x = 3 The orthocenter is (3, 5.2) The orthocenter lies inside the triangle.

Explanation: The slope of LM = $$\frac < 5> < 0>$$ = $$\frac < 1> < 3>$$ The slope of the perpendicular line = -3 The perpendicular line is (y – 5) = -3(x + 8) y – 5 = -3x – 24 3x + y + 19 = 0 — (ii) The slope of KL = $$\frac < 3> < -6>$$ = -1 The slope of the perpendicular line = $$\frac < 1> < 2>$$ The equation of perpendicular line (y – 5) = $$\frac < 1> < 2>$$(x – 0) 2y – 10 = x — (ii) Substitute (ii) in (i) 3(2y – 10) + y + 19 = 0 6y – 30 + y + 19 = 0 7y – 11 = 0 y = $$\frac < 11> < 7>$$ x = -6 The othrocenter is (-6, -1) The orthocenter lies outside of the triangle

## 6.4 The fresh Triangle Midsegment Theorem

Answer: New midsegment out-of Ab = (-6, 6) The new midsegment off BC = (-3, 4) The fresh new midsegment out-of Air cooling = (-3, 6)

Explanation: The midsegment of AB = ($$\frac < -6> < 2>$$, $$\frac afroromance Ã§evrimiÃ§i < 8> < 2>$$) = (-6, 6) The midsegment of BC = ($$\frac < -6> < 2>$$, $$\frac < 4> < 2>$$) = (-3, 4) The midsegment of AC = ($$\frac < -6> < 2>$$, $$\frac < 8> < 2>$$) = (-3, 6)

Answer: Brand new midsegment off De = (0, 3) Brand new midsegment from EF = (dos, 0) The new midsegment away from DF = (-1, -2)

Explanation: The midsegment of DE = ($$\frac < -3> < 2>$$, $$\frac < 1> < 2>$$) = (0, 3) The midsegment of EF = ($$\frac < 3> < 2>$$, $$\frac < 5> < 2>$$) = (2, 0) The midsegment of DF = ($$\frac < -3> < 2>$$, $$\frac < 1> < 2>$$) = (-1, -2)

Explanation: 4 + 8 > x 12 > x 4 + x > 8 x > 4 8 + x > 4 x > -4 4 < x < 12

Explanation: 6 + 9 > x 15 > x 6 + x > 9 x > 3 9 + x > 6 x > -3 3 < x < 15

Explanation: 11 + 18 > x 29 > x 11 + x > 18 x > 7 18 + x > 11 x > -7 7 < x < 29