Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 4 | E Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Help to solve
Date Posted: 10 months ago
Views: 174
Let's call the external angle at point D angle x.
Use pythagoras' theorem to find the adjacent side,
sqrt(100 - 35) = sqrt(64) = 8
cos(angle x) = 8/10 = 4/5
cos(CDE) = - cos(anglex) = -4/5
Use pythagoras' theorem to find the adjacent side,
sqrt(100 - 35) = sqrt(64) = 8
cos(angle x) = 8/10 = 4/5
cos(CDE) = - cos(anglex) = -4/5
Clear thank you
See 1 Answer
Refer to comments
360 Tutoring Program