Answer:
Ello, estoy aquí para ayudar, pero hablo español, con suerte, entenderás que lo estoy intentando.
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Step-by-step explanation:
The triangle ADC and the triangle CDB are similar. Therefore:
Answer: A 4.5
115 degrees because there are 180 degrees in a triangle so let the missing angle in the trinagle be x. Then we have x+75+40=180. Solving for x and subtracting that from 180 (supplementary angles) we get 115 degrees.
0.5a - 0.3 = 5
Add 0.3 to both sides:
0.5a = 5.3
Divide both sides by 0.5:
a = 10.6
