Please answer question 2,3 and 4 from the picture above

Mathematics

1 answer:

vesna_86 [32]4 years ago

4 0

For the first question: All you have to do is count the rectangles! So, not including the shaded rectangle, there are 14 that are equal in size. (If your teacher wants you to include the shaded rectangle in your answer, it is 15.)

For the second question: You just have to put the number of shaded rectangles (1) as the top number, or numerator. Then, you put the total number of rectangles as the bottom number, or denominator (15), to get you an answer if 1/15 of the square.

For the third question: the area of the square is 1 meter, so the fractional answer would just be 1/1. You could do it with the rectangles, too, and get 15/15 which reduces to 1/1 as your final answer.

Hope this helps! Good luck!

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How do l do this I’m so confused

Anika [276]

Answer:

$967.6cm^{2} (1 d.p)$

Step-by-step explanation:

Total Surface Area of Cylinder = $2\pi rh+2\pi r^{2}$

Given from the question, r = 7 cm and h = 15cm

Lets Substitute r and h into the formula to find the Total Surface Area of the cylinder.

Total Surface Area of Cylinder = $2\pi (7)(15)+2\pi (7)^{2} \\=210\pi +98\pi \\=308\pi cm^{2} \\=967.6cm^{2} (1 d.p)$

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The length of a side of a triangle is 36. A line parallel to that side divides the triangle into two parts of equal area. Find t

Hitman42 [59]

Answer:

Length of BE is $\frac{36}{\sqrt2}units$

Step-by-step explanation:

The length of a side of a triangle is 36. A line parallel to that side divides the triangle into two parts of equal area. we have to find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.

Now, the two parts of triangle have equal area ∴ ar(ADE)=ar(BDEC)

⇒ $ar(ADE)=\frac{1}{2}ar(ABC)$