Question
∆ABC and ∆DEF are similar and their areas are
respectively 121 cm2 and 144 cm 2 . If EF = 24 cm BC is?Solution
Ratio of perimeter of similar triangles = ratio of the corresponding sides of similar triangles. (area of ∆ABC)/(area of ∆DEF)=(BC/EF) 2 121/144 = (BC/24) 2 (11/12) 2 = (BC/24) 2 11/12 = BC/24 BC = (11 × 24)/12 = 22 cm
The internal, or geothermal, (1)/heat from within the Earth are (2)/ responsible for the fact that (3)/temperature increases with depth (4).
The consecration of (1)/the Eucharist, as well as (2)/the administration, (3)/were performed in English (4).
Most risk factors for (1)/pre-school overweight are modifiable (2)/and allows at-risk groups to (3)/be identified, say researchers (4).
An eye examination is called for (1)/once a year to ensure that (2)/diabetes have not resulted in retinopathy, (3)/which could lead to blindness (4).
Relevant for Exams:
