Answer:
530.93 units squared
Explanation:
The formula for the area of a circle is pi*r^2. The radius is half the diameter. So, 26/2 = 13.
pi*13^2 = ?
pi*169 = 530.93
The area is 530.93 units squared.
2 will agree and 2 will disagree so the answer is 4
She needs to use 3 pieces of ribbon which needs to be 8 inches long and
Answer:
a.) 4 : 9
b.) 16 : 81
Explanation:
a.) Ratio of perimeter will still be
4 : 9
b.) The two similar triangles ΔABC and ΔDEF as shown from the attached figures. That is
AB/DE = AC/DF = BC/EF
It is apparent that ΔAPB and ΔDEQ are also similar as all respective angles are equal. Hence,
AB/DE = AP/DQ = BP/EQ
Moreso ΔABC = 1/2 × BC × AP and ΔDEF = 1/2 × EF × DQ and
ΔAPB/ΔDEQ = BC/EF × AP/DQ
But
AP/DQ = AB/DE = BC/EF
and hence
ΔAPB/ΔDEQ = BC/EF × BC/EF
= BC^2/EF^2 and as
BC/EF = AC/DF = AB/DE
ΔAPB/ΔDEQ = AC^2/DF^2 = BC^2/EF^2
= AB^2/DE^2
Hence if sides of two similar triangles are in the ratio a:b, their areas are in the proportion a^2:b^2
As in given case sides are in the ratio of 4:9.
ratio of their areas is 4^2:9^2 or 16:81.
The main reason for the Seven Countries Study was to show the relationship between dietary patterns and the commonplace phenomena of coronary heart disease in different countries
<h3>What is the Seven Countries Study?</h3>
This refers to the systematic study and research that was done to find the link between the pattern of diet and the presence of coronary heart disease in different countries.
Hence, we can see that one of the main results of this study showed that population groups with the highest and lowest rates of heart disease both consumed at least 40% of their kcalories from fat but the healthier group was found to ingest more.
The individual countries that were a part of the Seven Countries Study are:
Read more about research study here:
brainly.com/question/968894
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