Angle ABD is 90°. 36ο
B
What is the measure of ZABC?
Ο Α. 369
Ο Β. 549
Ο Ο Ο Ο Ο
Ο C. 90°
Ο D. 1269
Ο Ε. 144

answer is 54. Since angleABD - angleCBD = angleABC

THEREFORE,. 90-36

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step-by-step explanation:

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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