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You can read posting Sarin learns Perimeter, Area and Volume in school (Math Concept) to learn the concept of area.
Read also the posting on Sarin learns Shapes and Solids in school (Math Concept) to know about shapes.
Read the posting on Sarin learns ratio in school (Math Concept) to learn about concept of Ratio.
Challenge yourself with the question before look out for the given solution‼!
Upper primary school mathematics question UPQ526
In the diagram, ∠ ABC = ∠ BDC, AB = 7 cm and AC = 5.4 cm.
- Prove that triangle ABC is similar to triangle ABD.
- Calculate the length of AD.
Compare the triangle ABC and the triangle ABD,
∠ ABC is common for both triangle
Given ∠ ABC = ∠ BDC
As the sum of the all three inner angles for a triangle is 1800
This mean, ∠ BCA = ∠ ABD
Hence, the triangle ABC is similar to triangle ABD
Separate the two triangles,
Based on the ratio of the length of the triangles,
AC : AB = AB : AD
5.4 : 7 = 7 : AD
AD = 49/5.4 = 9.074 cm