be, mg, ca, sr which of the following about the elements is true?

a. all of them are unreactive metalloids.

b. all of them are hard and dense metals.

c. be and mg are hard and dense metals and ca and sr are unreactive metalloids.

d. be and mg are unreactive metalloids and ca and sr are hard and dense metals.

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:

.

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

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

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step-by-step explanation:

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