conduct a survey on the consumption of electricity in your house or locality?
Answers
Based on 1128 survey questionnaires, main information on urban and rural household electricity consumption was obtained. Original data included household income, the price of electricity, all kinds of electrical appliances, purchase price of main appliances, household size, electricity consumption, as well as power, daily use time of electrical appliances in this data article. These data fully reflected behavior, preferences and living pattern of sample households in electricity use and provided the basis for analyzing the relationship between household electricity consumption and the quality of life (“Does electricity consumption improve residential living status in less developed regions? An empirical analysis using the quantile regression approach”
Explanation:
Between the triangle ARP and CRQ applying mid point theorem
RP ∥ BC and
RP =
2
1
BC = CQ.
And AR = RC ( R is the mid point of AC )
again PR ∥ BC and AC is the transversal.
Therefore angle ARP = angle RCQ.
Therefore the triangles are congruent by SAS test.
Area ΔARP=AreaΔ RCQ.
By applying the same midpoint theorem we can prove that each of the four triangles have the same area.
So, they divide the triangle into four equal areas.
Now total area = 20 sq. cm.
Therefore area of the Δ PQR is 20 sq.cm divided by 4 = 5 sq.cm