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drek231 [11]
3 years ago
14

PLEASE HELP

Mathematics
1 answer:
siniylev [52]3 years ago
8 0
 The arc mCAD is 288.

Given: DAB and DCB are right angles; <span>BDC = 54°
Required: arc </span><span>mCAD
Solution:
 (2 x 54</span>°) + (2 x 54°) + (2 x 36°<span>) = 288
 
Note: in getting 36</span>°, deduct 54° and 90° (right angle) from 180° (which is the total degrees inside a triangle)
   = 180° - 54° - 90°
   = 36° - this is the angle CBD or angle ABD
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