six.5 Secondary Facts and you may Inequalities in one single Triangle

6.step 3 Medians and Altitudes away from Triangles

Give whether or not the orthocenter of the triangle into the provided vertices is into the, towards, otherwise outside of the triangle. After that discover the coordinates of your 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.cuatro The Triangle Midsegment Theorem

Answer: The midsegment out of Abdominal = (-6, 6) The brand new midsegment off BC = (-step 3 https://datingranking.net/tr/bookofsex-inceleme/, 4) The latest midsegment out-of Air-conditioning = (-step three, 6)

Explanation: The midsegment of AB = ($$\frac < -6> < 2>$$, $$\frac < 8> < 2>$$) = (-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: The newest midsegment away from De- = (0, 3) New midsegment away from EF = (2, 0) The fresh new midsegment off DF = (-step one, -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