Cho tam giác abc vuông tại a biết ab = 9 và góc c = 30 độ a) giải tam giác abc vuông
b) kẻ đường cao tam giác ah của tam giác abc .tính ah , bh
c)

if x decreases by 4 then y increases by 10

step-by-step explanation:

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

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to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

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step-by-step explanation:

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