00:01
10, we have our two triangles here.
00:06
We have a, b, x, y, z.
00:11
Y is the midpoint of x, z.
00:12
So we know that x, y is concurrent to y z.
00:15
We know that a, y is concurrent to b, y.
00:20
And then we know that a, y, x, angle a, y, x is congruent to b, y, z.
00:26
So we know that triangle x, y, a, is congruent to b, z.
00:32
To triangle z, y, b by side angle side.
00:43
11, we have an isosceles triangle, rts, with your legs being rt and ts, which means those two are concurrent...